C11111333133313232233133313331333133112111112113313113313231311211233131   >>    C1111133313331323223313331333133313311211111211331311331323131121123313   <<    C11111333133313232233133313331333133112111112113313113313231311211233133   >>      C11111333133313232233133313331333133112111112113313113313231311211233132   >>