C11111211113313112113313331333133313331333132311233133313331333231121   >>    C1111121111331311211331333133313331333133313231123313331333133323112   <<    C11111211113313112113313331333133313331333132311233133313331333231123   >>      C11111211113313112113313331333133313331333132311233133313331333231122   >>