diff --git a/solutions/typescript/line-up/1/line-up.ts b/solutions/typescript/line-up/1/line-up.ts
new file mode 100644
index 0000000..751ca47
--- /dev/null
+++ b/solutions/typescript/line-up/1/line-up.ts
@@ -0,0 +1,19 @@
+export function format(name: unknown, number: unknown): unknown {
+  let stringVersion: string = ``;
+  let postfix: string = ``;
+  if (typeof number === `number`) {
+    stringVersion = number.toString();
+    postfix = stringVersion[stringVersion.length - 1];
+  }
+  if (postfix === `1` && stringVersion !== `11`) {
+    postfix = `${stringVersion}st`;
+  } else if (postfix === `2` && stringVersion !== `12`  && stringVersion !== `112`) {
+    postfix = `${stringVersion}nd`;
+  } else if (postfix === `3` && stringVersion !== `13`) {
+    postfix = `${stringVersion}rd`;
+  } else {
+    postfix = `${stringVersion}th`;
+  }
+
+  return `${name}, you are the ${postfix} customer we serve today. Thank you!`;
+}
\ No newline at end of file