Barcode Nickname

This problem uses both the characters 'l' and 'I'. Outside the examples, the lowercase 'l' is shown in red $\color{red}{\text{l}}$ and the uppercase 'I' in blue $\color{blue}{\text{I}}$.

A barcode nickname is a nickname that uses only the lowercase $\color{red}{\text{l}}$ and the uppercase $\color{blue}{\text{I}}$. People use them to make their online accounts anonymous. These two characters are hard to tell apart, so a barcode nickname makes it hard to find out who the user is.

There is a simple way to tell such nicknames apart. Flip the case of every character, and $\color{red}{\text{l}}$ becomes 'L' while $\color{blue}{\text{I}}$ becomes 'i'. This makes it easy to tell the two look-alike characters apart.

Given a barcode nickname, write a program that flips the case of every character and prints the result.

The first line contains the length $n$ of the barcode nickname ($1 \le n \le 500$).

The second line contains the barcode nickname $S$ ($S\_i = \color{red}{\text{l}}$ or $S\_i = \color{blue}{\text{I}}$).

Print the input string with the case of every character flipped, on one line.