14 1 2 3 4 5 6 1 2 3 4 51 6 5 14 7 42 1 2 3 4 12 18 1 2 3 4 18 1 2 7 4 5 1 2 7 13 5 9 14 9 4 9 16 ./appendop.tests: line 83: x: readonly variable