C1111233131211111211113313331333133313331322322331312111113331311211233131221   >>    C111123313121111121111331333133313331333132232233131211111333131121123313122   <<    C1111233131211111211113313331333133313331322322331312111113331311211233131223   >>      C1111233131211111211113313331333133313331322322331312111113331311211233131222   >>