import extensions;

public program()
{
    var s := "abcd";

    console.printLine(s," starts with ab: ",s.startingWith:"ab");
    console.printLine(s," starts with cd: ",s.startingWith:"cd");

    console.printLine(s," ends with ab: ",s.endingWith:"ab");
    console.printLine(s," ends with cd: ",s.endingWith:"cd");

    console.printLine(s," contains ab: ",s.containing:"ab");
    console.printLine(s," contains bc: ",s.containing:"bc");
    console.printLine(s," contains cd: ",s.containing:"cd");
    console.printLine(s," contains az: ",s.containing:"az");

    console.printLine(s," index of az: ",s.indexOf(0, "az"));
    console.printLine(s," index of cd: ",s.indexOf(0, "cd"));
    console.printLine(s," index of bc: ",s.indexOf(0, "bc"));
    console.printLine(s," index of ab: ",s.indexOf(0, "ab"));

    console.readChar()
}