C111123313331323113313331333133313331323131211113313231323132321111   >>    C11112331333132311331333133313331333132313121111331323132313232111   <<    C111123313331323113313331333133313331323131211113313231323132321113   >>      C111123313331323113313331333133313331323131211113313231323132321112   >>