# @param {String} secret

# @param {String} guess

# @return {String}

def get_hint(secret, guess)

bulls = 0; cows = 0

index = 0

size = secret.size

while index < size

if secret[index] == guess[index]

bulls += 1

secret[index] = guess[index] = 'X'

end

index += 1

end

i = 0; j = 0

while i < size

if secret[i] != 'X'

j = 0

while j < size

if guess[j] != 'X' and secret[i] == guess[j]

cows += 1

secret[i] = 'X'

guess[j] = 'X'

end

j += 1

end

end

i += 1

end

bulls.to_s + 'A' + cows.to_s + 'B'

end

puts get_hint '1111', '1111'

puts get_hint '1807', '7810'

puts get_hint '1123', '0111'