looking for 000
looking for 00
['1', '0', '0', '1', '1', '0', '0']
1
['0', '0', '1', '1', '0', '0']
1
['0', '1', '0', '0']
1
looking for 01
looking for 10
['1', '0']
1
looking for 1
['0']
1
QAQ