C1111233131211111211113313331333133313331313221131211113313232212331322121121   >>    C111123313121111121111331333133313331333131322113121111331323221233132212112   <<    C1111233131211111211113313331333133313331313221131211113313232212331322121123   >>      C1111233131211111211113313331333133313331313221131211113313232212331322121122   >>