-- Random integers, large range Insertion: passed Insertion: passed Removal: passed -- Random integers, narrow range Insertion: passed Insertion: passed Removal: passed -- Strings, generic interface Insertion: passed Insertion: passed Removal: passed -- Strings, functorial interface Insertion: passed Insertion: passed Removal: passed -- Strings, functorial(String) interface Insertion: passed Insertion: passed Removal: passed -- Pairs of strings Insertion: passed Insertion: passed Removal: passed -- Lists of strings Insertion: passed Insertion: passed Removal: passed 1000 elements 100,2 200,4 300,6 400,8 500,10 600,12 700,14 800,16 900,18 1000,20 10 elements