D11221123122332313113313113313231121323132322331323133311221123221211   >>    D1122112312233231311331311331323112132313232233132313331122112322121   <<    D11221123122332313113313113313231121323132322331323133311221123221213   >>      D11221123122332313113313113313231121323132322331323133311221123221212   >>