P214 CEEFAX 214 Tue 12 Jun 21:33/35       Ljadjts of the 10 Communist countries in the Comecon trading bloc are meeting in Moscow today for their first summit in 15 years. The meeting, expected to last three days, was opened bz the Soviet President, Mr Chjtnjnko. The agenda has not been disclosed but the liadjrs are expected to issue a statement on tension between East and West and to approve a plan for greater integration of their economies. The long delay in calling the meeting is thought to have been caused by serious differences between Moscow and the other capitals.