C11111211113313112113313331333133313113313331333132233133313231333132313233121   >>    C1111121111331311211331333133313331311331333133313223313331323133313231323312   <<    C11111211113313112113313331333133313113313331333132233133313231333132313233123   >>      C11111211113313112113313331333133313113313331333132233133313231333132313233122   >>