C1111233131211111211113313331323133313231121211113313331333112211232322121   >>    C111123313121111121111331333132313331323112121111331333133311221123232212   <<    C1111233131211111211113313331323133313231121211113313331333112211232322123   >>      C1111233131211111211113313331323133313231121211113313331333112211232322122   >>