Input (grade 9): A number of 6 m Trailer Sailers sailed on Lake Eyre in 1975, 1976 and 1984 when the flood depth reached 3 â "6 m (10 â" 20 ft).
Output (grade 7): A number of 6 m Trailer Sailers sailed on Lake Eyre in 1975, 1976 and 1984 when the flood depth reached 3 â "6 m.