#all values have been right shifted to get rid of lsb $i1 = 0b1010_0100; $i2 = 0b0100_1000; #the above two numbers are a valid pair. # yet my list may not contain either ~$i1 or ~$i2 $i1_bits_reversed = 0b0101_1011; $i2_bits_reversed = 0b1011_0111 # the above two numbers are not a valid pair,