C1111233131211111211113313331333133313331313331333133313331333112132313221   >>    C111123313121111121111331333133313331333131333133313331333133311213231322   <<    C1111233131211111211113313331333133313331313331333133313331333112132313223   >>      C1111233131211111211113313331333133313331313331333133313331333112132313222   >>