C11111211113313112113313331333133313133313232233133313231331123232111   >>    C1111121111331311211331333133313331313331323223313331323133112323211   <<    C11111211113313112113313331333133313133313232233133313231331123232113   >>      C11111211113313112113313331333133313133313232233133313231331123232112   >>