C11111211113313112113313331333133313133313232233133313233331311211   >>    C1111121111331311211331333133313331313331323223313331323333131121   <<    C11111211113313112113313331333133313133313232233133313233331311213   >>      C11111211113313112113313331333133313133313232233133313233331311212   >>