C1111233131211111211113313331333133313331313221131211113313233211331311   >>    C111123313121111121111331333133313331333131322113121111331323321133131   <<    C1111233131211111211113313331333133313331313221131211113313233211331313   >>      C1111233131211111211113313331333133313331313221131211113313233211331312   >>