C11111333133313232233133313331333133112111112113313231333133313231323211231   >>    C1111133313331323223313331333133313311211111211331323133313331323132321123   <<    C11111333133313232233133313331333133112111112113313231333133313231323211233   >>      C11111333133313232233133313331333133112111112113313231333133313231323211232   >>