C111123313331323113313331333133313231323133312111133131113231123311   >>    C11112331333132311331333133313331323132313331211113313111323112331   <<    C111123313331323113313331333133313231323133312111133131113231123313   >>      C111123313331323113313331333133313231323133312111133131113231123312   >>