C1111233131211111211113313331333132313231323223313331323331123222221   >>    C111123313121111121111331333133313231323132322331333132333112322222   <<    C1111233131211111211113313331333132313231323223313331323331123222223   >>      C1111233131211111211113313331333132313231323223313331323331123222222   >>