val1 >= val2 >= val3...........val1" "val2" "val3
val1 >= val3 >= val2...........val1" "val3" "val2
val2 >= val1 >= val3...........val2" "val1" "val3
val2 >= val3 >= val1...........val2" "val3" "val1
val3 >= val1 >= val2...........val3" "val1" "val2
val3 >= val2 >= val1...........val3" "val2" "val1
input values (4,5,7) expected output (7,5,4) output (7,5,4)