diff --git a/packages/core/src/systems/en-US/short-count/parse.ts b/packages/core/src/systems/en-US/short-count/parse.ts
index fa6a40a..489a127 100644
--- a/packages/core/src/systems/en-US/short-count/parse.ts
+++ b/packages/core/src/systems/en-US/short-count/parse.ts
@@ -46,8 +46,8 @@ export const tokenize = (value: string) => (
 		.replace(/\n+/gs, ' ')
 		.replace(/\s+/g, ' ')
 		.replace(
-			new RegExp(`${SHORT_MILLIA_ILLION_DELIMITER}${T_AFFIX}${ILLION_SUFFIX}`, 'g'),
-			`${T_AFFIX}${ILLION_SUFFIX}`,
+			new RegExp(`${MILLIA_PREFIX}\\${SHORT_MILLIA_DELIMITER}(\\d+)${SHORT_MILLIA_ILLION_DELIMITER}`, 'g'),
+			(_substring, milliaCount: string) => `${MILLIA_PREFIX}${SHORT_MILLIA_DELIMITER}${milliaCount}`,
 		)
 		.replace(new RegExp(`${TENS_ONES_SEPARATOR}`, 'g'), ' ')
 		.split(' ')
diff --git a/packages/core/src/systems/en-US/short-count/stringify.ts b/packages/core/src/systems/en-US/short-count/stringify.ts
index 25ff09d..73ded72 100644
--- a/packages/core/src/systems/en-US/short-count/stringify.ts
+++ b/packages/core/src/systems/en-US/short-count/stringify.ts
@@ -82,12 +82,16 @@ const makeHundredsName = (hundreds: number, tens: number, ones: number, addTensD
  * @param longestMilliaCount - Number of millia- groups.
  * @returns string The millions prefix.
  */
-const makeMillionsPrefix = (millions: number, longestMilliaCount: GroupPlace) => {
-	if (longestMilliaCount > 0) {
-		return MILLIONS_PREFIXES[millions] as MillionsPrefix;
+const makeMillionsPrefix = (
+	millions: number,
+	currentMillia: GroupPlace,
+	longestMilliaCount: GroupPlace,
+) => {
+	if (currentMillia === BigInt(0) && longestMilliaCount === BigInt(0)) {
+		return MILLIONS_SPECIAL_PREFIXES[millions] as MillionsSpecialPrefix;
 	}
 
-	return MILLIONS_SPECIAL_PREFIXES[millions] as MillionsSpecialPrefix;
+	return MILLIONS_PREFIXES[millions] as MillionsPrefix;
 };
 
 /**
@@ -100,10 +104,11 @@ const makeMillionsPrefix = (millions: number, longestMilliaCount: GroupPlace) =>
 const makeDecillionsPrefix = (
 	decillions: number,
 	millions: number,
+	currentMillia: GroupPlace,
 	longestMilliaCount: GroupPlace,
 ) => {
 	if (decillions === 0) {
-		return makeMillionsPrefix(millions, longestMilliaCount);
+		return makeMillionsPrefix(millions, currentMillia, longestMilliaCount);
 	}
 
 	const onesPrefix = MILLIONS_PREFIXES[millions] as MillionsPrefix;
@@ -123,10 +128,11 @@ const makeCentillionsPrefix = (
 	centillions: number,
 	decillions: number,
 	millions: number,
+	currentMillia: GroupPlace,
 	longestMilliaCount: GroupPlace,
 ) => {
 	if (centillions === 0) {
-		return makeDecillionsPrefix(decillions, millions, longestMilliaCount);
+		return makeDecillionsPrefix(decillions, millions, currentMillia, longestMilliaCount);
 	}
 
 	const onesPrefix = MILLIONS_PREFIXES[millions] as MillionsPrefix;
@@ -189,11 +195,14 @@ const getGroupName = (place: GroupPlace, shortenMillia: boolean) => {
 		.filter(([groupDigits]) => groupDigits !== EMPTY_GROUP_DIGITS)
 		.map(([groupDigits, groupPlace], _index, millias) => {
 			const [hundreds, tens, ones] = groupDigits.split('').map(Number);
+			const largestMillia = millias[0][GROUP_PLACE_INDEX];
+
 			const centillionsPrefix = makeCentillionsPrefix(
 				hundreds,
 				tens,
 				ones,
-				BigInt(millias.length - 1)
+				groupPlace,
+				largestMillia,
 			);
 
 			if (groupPlace < 1) {
@@ -206,7 +215,7 @@ const getGroupName = (place: GroupPlace, shortenMillia: boolean) => {
 					: repeatString(MILLIA_PREFIX, groupPlace)
 			);
 
-			if (groupDigits === '001') {
+			if (groupDigits === '001' && groupPlace === largestMillia) {
 				return milliaSuffix;
 			}
 
diff --git a/packages/core/test/systems/en-US.test.ts b/packages/core/test/systems/en-US.test.ts
index 2da2c7e..2b89bf0 100644
--- a/packages/core/test/systems/en-US.test.ts
+++ b/packages/core/test/systems/en-US.test.ts
@@ -295,5 +295,10 @@ describe('numerica', () => {
 		expect(parse(shortMillia2)).toBe('1e+3000003');
 		expect(stringify(parse(shortMillia2), { stringifyGroupsOptions: { shortenMillia: true } }))
 			.toBe(shortMillia2);
+
+		const exp = '1e+3003003';
+		const shortMillia3 = 'one millia^2-unmilliatillion';
+		expect(stringify(exp, { stringifyGroupsOptions: { shortenMillia: true } })).toBe(shortMillia3);
+		expect(parse(shortMillia3)).toBe('1e+3003003');
 	});
 });
diff --git a/packages/example-web/index.html b/packages/example-web/index.html
index 2c39f99..b83ccbd 100644
--- a/packages/example-web/index.html
+++ b/packages/example-web/index.html
@@ -150,8 +150,8 @@
 
 				const options = {
 					stringify: {
-						makeGroupOptions: {},
-						finalizeOptions: {},
+						stringifyGroupsOptions: {},
+						mergeTokensOptions: {},
 					},
 					parse: {
 						type: 'bigint',
@@ -193,19 +193,19 @@
 				});
 
 				addTensDashesCheckbox.addEventListener('change', (e) => {
-					options.stringify.makeGroupOptions.addTensDashes = e.currentTarget.checked;
+					options.stringify.stringifyGroupsOptions.addTensDashes = e.currentTarget.checked;
 					numberInput.dispatchEvent(new Event('input'));
 					nameInput.placeholder = createNamePlaceholder(options);
 				});
 
 				shortenMilliaCheckbox.addEventListener('change', (e) => {
-					options.stringify.makeGroupOptions.shortenMillia = e.currentTarget.checked;
+					options.stringify.stringifyGroupsOptions.shortenMillia = e.currentTarget.checked;
 					numberInput.dispatchEvent(new Event('input'));
 					nameInput.placeholder = createNamePlaceholder(options);
 				});
 
 				oneGroupPerLineCheckbox.addEventListener('change', (e) => {
-					options.stringify.finalizeOptions.oneGroupPerLine = e.currentTarget.checked;
+					options.stringify.mergeTokensOptions.oneGroupPerLine = e.currentTarget.checked;
 					numberInput.dispatchEvent(new Event('input'));
 					nameInput.placeholder = createNamePlaceholder(options);
 				});
@@ -229,9 +229,9 @@
 					nameInput.placeholder = createNamePlaceholder(options);
 				});
 
-				options.stringify.makeGroupOptions.addTensDashes = addTensDashesCheckbox.checked;
-				options.stringify.makeGroupOptions.shortenMillia = shortenMilliaCheckbox.checked;
-				options.stringify.finalizeOptions.oneGroupPerLine = oneGroupPerLineCheckbox.checked;
+				options.stringify.stringifyGroupsOptions.addTensDashes = addTensDashesCheckbox.checked;
+				options.stringify.stringifyGroupsOptions.shortenMillia = shortenMilliaCheckbox.checked;
+				options.stringify.mergeTokensOptions.oneGroupPerLine = oneGroupPerLineCheckbox.checked;
 				options.stringify.system = systems[localeSelect.value][variantSelect.value];
 				options.parse.system = systems[localeSelect.value][variantSelect.value];
 				Array.from(variantSelect.options).forEach((option) => {