Finally

phase_5.py

from re import findall

array = [10, 2, 14, 7, 8, 12, 15, 11, 0, 4, 1, 13, 3, 9, 6]


def phase_5():
    a, b = map(lambda x: int(x), findall("\d+", raw_input()))
    a &= 0xf

    if a != 0xf:
        c, d = 0, 0
        while True:
            d += 1
            a = array[a]
            c += a
            if a == 0xf:
                break

        if d == 15 or c == b:
            return

    print "BOOM"

if __name__ == '__main__':
    phase_5()