D1313331322132333132333132312312323331323223313113313233313231333133313222121   >>    D131333132213233313233313231231232333132322331311331323331323133313331322212   <<    D1313331322132333132333132312312323331323223313113313233313231333133313222123   >>      D1313331322132333132333132312312323331323223313113313233313231333133313222122   >>