CareerCup

This should work for 2- and 3-digit numbers as well.

public static void nlines(int n) {
        if (n < 2) {
            System.out.println(n);
        } else {
            IntStream.concat(IntStream.of(n), IntStream.rangeClosed(1, n))
                    .mapToObj(i ->
                            String.format(
                                    "%" + n/2 + "s" +
                                    "%0" + Integer.toString(n).length() + "d" +
                                    "%" + n/2 + "s",
                                    "", i, "")
                            .replace(" ", Integer.toString(n))
                    )
                    .forEach(System.out::println);
        }
    }

void seattleLineParser(String input){
    def lines = input.split("[!.,][\\s+]");
    for (line in lines){
        def newLine = ""
        def first = true
        for (char_ in line.replace("!", "").toCharArray()){
            if (first) { first = false; newLine += char_.toUpperCase() }
            else newLine += char_.toLowerCase()
        }
        println "$newLine."
    }
}

seattleLineParser("Sea!tle is a nice place. Work Hard! have Fun, make HIStory!")