Someone

	for i in range(4):		arr[i] = ((arr[i]^0x17)+0x17)&0xFF; 		lx = arr[0]&0x3F	ly = arr[1]&0x3F	rx = (arr[0]&0xC0)>>3 | (arr[1]&0xC0)>>5 | (arr[2]&0x80)>>7	ry = arr[2]&0x1F	lt = (arr[2]&0x60)>>2 | (arr[3]&0xE0)>>5	rt = arr[3]&0x1F