# Substrings (Hello) - Practice Exercises C# Sharp

## Lesson 5:

## Functions

## Exercise 5.30:

## Substrings (Hello)

## Objetive:

## So you've registered. We sent you a welcoming email, to welcome you to code jam.
But it's possible that you still don't feel welcomed to code jam. That's why we
decided to name a problem "welcome to code jam."

After solving this problem, we hope that you'll feel very welcome. Very welcome,
that is, to code jam.

If you read the previous paragraph, you're probably wondering why it's there. But
if you read it very carefully, you might notice that we have written the words "welcome
to code jam" several times: 400263727 times in total. After all, it's easy to look
through the paragraph and find a 'w'; then find an 'e' later in the paragraph; then
find an 'l' after that, and so on. Your task is to write a program that can take
any text and print out how many times that text contains the phrase "welcome to
code jam".

To be more precise, given a text string, you are to determine how many times the
string "welcome to code jam" appears as a sub-sequence of that string. In other
words, find a sequence s of increasing indices into the input string such that the
concatenation of input[s[0]], input[s[1]], ..., input[s[18]] is the string "welcome
to code jam". The result of your calculation might be huge, so for convenience we
would only like you to find the last 4 digits.

Input

The first line of input gives the number of test cases, N. The next N lines of input
contain one test case each. Each test case is a single line of text, containing
only lower-case letters and spaces. No line will start with a space, and no line
will end with a space.

Output

For each test case, "Case #x: dddd", where x is the case number, and dddd is the
last four digits of the answer. If the answer has fewer than 4 digits, please add
zeroes at the front of your answer to make it exactly 4 digits long.

Limits

1 ≤ N ≤ 100

Small dataset

Each line will be no longer than 30 characters.

Large dataset

Each line will be no longer than 500 characters.

## Source Code:

Exercisey 5.30