41.   The two sides will exchange letters outlining the new regime today, the U.S. official said.

42.   They exchanged letters, and last month Ms. Berenson came to visit her family in New York City.

43.   They exchanged letters, telephone calls.

44.   They had exchanged letters since then and had spoken for the first time two weeks ago.

45.   They exchanged letters when Smith played in junior high school and later as a prep star in the Los Angeles area.

46.   They had exchanged letters since then and had spoke for the first time two weeks ago.

47.   Usually, the U.S. Secretary of State exchanges a letter with his counterpart.

48.   We had exchanged letters earlier, but there would be no more correspondence between us.

49.   While Brian was on the West Coast, he exchanged letters almost weekly with Smith.

50.   Wingard and the group have exchanged nasty letters.