que: a = a|3
ans: a |= 3
que: a = a & 0x48
ans: a &= 0x48
que: b = b^0x22
ans: b ^= 0x22
que: c = c << 2
ans: c <<= 2
que: d = d >> 4
ans: d >>= 4
que: a = a|3
ans: a |= 3
que: a = a & 0x48
ans: a &= 0x48
que: b = b^0x22
ans: b ^= 0x22
que: c = c << 2
ans: c <<= 2
que: d = d >> 4
ans: d >>= 4