void main() {

    import std.algorithm, std.range;

    assert([1,2,3,4,5,6,7,8,9,10,11].assumeSorted.canFind(6));

    assert(! [1,2,3,4,5,7,8,9,10,11].assumeSorted.canFind(6));

    assert("abcdefghijklmnopqrstuvwxyz".assumeSorted.canFind("j"));

    import std.stdio;

    writeln("Assert tests passed!");

}