Hacks

1)

Checker:
wrong answer Token "MEM" doesn't correspond to pattern "[A-Z]{2}"

Input:
3
LOL

Output:
MEM

Answer:
LO

2)

Checker:
wrong answer Token "MEM" doesn't correspond to pattern "[A-Z]{2}"

Input:
3
KEK

Output:
MEM

Answer:
EK

3)

Checker:
wrong answer Token "SAMFUFEL" doesn't correspond to pattern "[A-Z]{2}"

Input:
5
FUFEL

Output:
SAMFUFEL

Answer:
EL

4)

Checker:
wrong answer Token "KYRLYK" doesn't correspond to pattern "[A-Z]{2}"

Input:
9
MIKEPIDOR

Output:
KYRLYK

Answer:
DO

5)

Checker:
wrong answer Token "KYRLYK" doesn't correspond to pattern "[A-Z]{2}"

Input:
15
MIRZOYANOVECLOX

Output:
KYRLYK

Answer:
AN

6)

Checker:
wrong answer Token "KYRLYK" doesn't correspond to pattern "[A-Z]{2}"

Input:
9
EGORLETOV

Output:
KYRLYK

Answer:
EG

7)

Checker:
wrong answer Token "KYRLYK" doesn't correspond to pattern "[A-Z]{2}"

Input:
8
PUTINVOR

Output:
KYRLYK

Answer:
IN

8)

Checker:
wrong answer Token "KYRLYK" doesn't correspond to pattern "[A-Z]{2}"

Input:
7
KADUROV

Output:
KYRLYK

Answer:
AD

9)

Checker:
wrong answer Token "KYRLYK" doesn't correspond to pattern "[A-Z]{2}"

Input:
6
AZAZAZ

Output:
KYRLYK

Answer:
AZ

10)

Checker:
wrong answer Token "SLAVEK" doesn't correspond to pattern "[A-Z]{2}"

Input:
5
AZAZA

Output:
SLAVEK

Answer:
AZ