ru = {
    '1' : 'A',
    '2' : 'B'
}

choose = input('')
choose1 = choose.upper()
lenn = len(choose1)

print()
listing = list(choose1)
i = 0
d = 0
sum = []
while i < lenn:
    sum += [ru[listing[i]]]
    # print( ru[listing[i]])
    i += 1
    d += 1
    if d == lenn:

        b = 0
        a = 0
        print('Готово!: ')


        for b in sum:

            print(b, end='')
        continue