C1111233131211111211113313331333133313331313221131211113323223231   >>    C111123313121111121111331333133313331333131322113121111332322323   <<    C1111233131211111211113313331333133313331313221131211113323223233   >>      C1111233131211111211113313331333133313331313221131211113323223232   >>