Score : $100$ points

Problem Statement

Print the $L$-th through $R$-th characters of the string atcoder.

Constraints

• $L$ and $R$ are integers.
• $1 \le L \le R \le 7$

Input

Input is given from Standard Input in the following format:

$L$ $R$

Output

Print the answer.

3 6

code

The $3$-rd through $6$-th characters of atcoder are code.

4 4

o

1 7

atcoder