C1111233131211111211113313331333133313331313221131211113313232212331323221231   >>    C111123313121111121111331333133313331333131322113121111331323221233132322123   <<    C1111233131211111211113313331333133313331313221131211113313232212331323221233   >>      C1111233131211111211113313331333133313331313221131211113313232212331323221232   >>