C1111233131211111211113313331333133313231323331333133313233313332221   >>    C111123313121111121111331333133313331323132333133313331323331333222   <<    C1111233131211111211113313331333133313231323331333133313233313332223   >>      C1111233131211111211113313331333133313231323331333133313233313332222   >>