C11111211113313112113313331333133313331333132233131133133313331323133313231221   >>    C1111121111331311211331333133313331333133313223313113313331333132313331323122   <<    C11111211113313112113313331333133313331333132233131133133313331323133313231223   >>      C11111211113313112113313331333133313331333132233131133133313331323133313231222   >>