C11111211113313112113313331333133313331333121131211113313231323322331121   >>    C1111121111331311211331333133313331333133312113121111331323132332233112   <<    C11111211113313112113313331333133313331333121131211113313231323322331123   >>      C11111211113313112113313331333133313331333121131211113313231323322331122   >>