1973 1975 1971 1977
1978 1974 1972 1976
1972 1978 1976 1974
1976 1974 1978 1972
1979 1971 1974 1977
1973 1971 1979 1975
1979 1973 1970 1975
1973 1979 1975 1977
1975 1979 1973 1977