C11111211113313112113313331333133313133313232233133112323132311   >>    C1111121111331311211331333133313331313331323223313311232313231   <<    C11111211113313112113313331333133313133313232233133112323132313   >>      C11111211113313112113313331333133313133313232233133112323132312   >>