def changeBits(a, b, queries):
    a, b = int(a, 2), int(b, 2)

    for q in queries:
        q = q.rstrip().split()
        i = int(q[1])
        if q[0] == 'set_a':
            if q[2] == '1':
                a |= 1<<i
            else:
                a &= ~(1<<i)
        elif q[0] == 'set_b':
            if q[2] == '1':
                b |= 1<<i
            else:
                b &= ~(1<<i)
        else:
            c = a + b
            if not c & (1<<i):
                print('0', end="")
            else:
                print('1', end="")