C11112331333132311331333133313331333132313121111331333132233132312231231   >>    C1111233133313231133133313331333133313231312111133133313223313231223123   <<    C11112331333132311331333133313331333132313121111331333132233132312231233   >>      C11112331333132311331333133313331333132313121111331333132233132312231232   >>