C1111233131211111211113313331333133313231323331333131113113313331323222221   >>    C111123313121111121111331333133313331323132333133313111311331333132322222   <<    C1111233131211111211113313331333133313231323331333131113113313331323222223   >>      C1111233131211111211113313331333133313231323331333131113113313331323222222   >>