D11211112331322331311211331323113313233313331323133313113313221121   >>    D1121111233132233131121133132311331323331333132313331311331322112   <<    D11211112331322331311211331323113313233313331323133313113313221123   >>      D11211112331322331311211331323113313233313331323133313113313221122   >>