# ============================================================
# Problem 1
# A 3x3 board is given.
# Count how many 'A' characters exist.

# Input
# ABC
# DAF
# GHA

# Output
# 3
# ============================================================


# Problem 2
# A 3x3 board is given.
# Count how many 'S' characters exist.

# Input
# SUN
# CAT
# BUS

# Output
# 2

# ============================================================

# Problem 3
# Two 3x3 boards are given.
# Count how many characters are the SAME
# and in the SAME position.

# Input
# ABC
# DEF
# GHI

# AXC
# DZF
# GHQ

# Output
# 6