C111123313331323113313331333133313331323133112113313232233132233321311   >>    C11112331333132311331333133313331333132313311211331323223313223332131   <<    C111123313331323113313331333133313331323133112113313232233132233321313   >>      C111123313331323113313331333133313331323133112113313232233132233321312   >>