Timecard

In IOI 2018, we will record names of person who enters the arena. The record will consist of uppercase letters of the Latin alphabet and/or lowercase ones. To make it easier to read, you will have to convert uppercase letters on the record to lowercase.

• 1 ≤ N ≤ 100
• 1 ≤ |s| ≤ 20 (Here |s| is the length of the string s.)