3:18-27 TModule "Data.List"
6:1-2 TVariable "a"
6:5-13 TModule "Prelude."
6:13-22 TVariable "undefined"
7:1-2 TVariable "b"
7:8-18 TModule "Data.List."
7:18-22 TClassMethod "elem"
8:1-2 TVariable "c"
8:6-14 TModule "Prelude."
8:14-15 TOperator "+"
9:1-2 TVariable "d"
9:6-7 TOperator "+"