C11111333133313232233133313331333133313211231133132313231323132333132322121   >>    C1111133313331323223313331333133313331321123113313231323132313233313232212   <<    C11111333133313232233133313331333133313211231133132313231323132333132322123   >>      C11111333133313232233133313331333133313211231133132313231323132333132322122   >>