C11111211113313112113313331333133313133313232233133313231323133313331312133121   >>    C1111121111331311211331333133313331313331323223313331323132313331333131213312   <<    C11111211113313112113313331333133313133313232233133313231323133313331312133123   >>      C11111211113313112113313331333133313133313232233133313231323133313331312133122   >>