C111123313331323113313331333133313331323132311233133313221211121   >>    C11112331333132311331333133313331333132313231123313331322121112   <<    C111123313331323113313331333133313331323132311233133313221211123   >>      C111123313331323113313331333133313331323132311233133313221211122   >>