Original sentence: 1952 - 1989.1954 - 1975.1955 - 1983.1955 - 1990.1956 - 1968.1965 - 1989.1971 - 1989.1978 - present.1979 - 1997.1980 - present.1989 - present.1992 - present.DF of 1954.DF of 1979.DH of 1956.In service
Edited sentence: 1000 - 1016.1001 - 1180.11 - 63.1199 - 1295.1308 - 1458.1400 - 1404, 1406.1400 - 1545.1500 - 1510 (1954)  1300 - 1309 (1960).1551 - 1599.1651 - 1670.1955 - 1956.1955 - 1967.1965 - 1966.1971 - 1990.1972 - 1975.1978 - 1983.1979 - 1981.1980 - 1982.1980 - 1989.1987 - 1989.1992 - 1997.2007 - 2468.4006 - 4951.4277 - 4945.501 - 515.6006 - 6317.7008 - 7348.7010 - 7307.7036 - 7226.750 - 791.766, 772, 777 - 783.86 - 996.DF (1954).DF (1979).DH (1956).Power output.TMS (1980).Year(s) introduced.Year(s) withdrawn.still in use