C1111233131211111211113313331333133313331312331333131211113312212211111   >>    C111123313121111121111331333133313331333131233133313121111331221221111   <<    C1111233131211111211113313331333133313331312331333131211113312212211113   >>      C1111233131211111211113313331333133313331312331333131211113312212211112   >>