# ============================================================
# Problem 6
# A 3x3 board is given.
# Print all characters in one line.

# Input:
# ABC
# DEF
# GHI


# Output:
# ABCDEFGHI
# ============================================================





# ============================================================
# Problem 7
# A 3x3 board is given.
# Count how many characters are 'A' or 'B'.

# Input:
# ABC
# BBA
# CAA

# Output:
# 6