/* Given two words, the letter distance is calculated by taking the absolute * value of the difference in character codes and summing up the difference. * If one word is longer than another, add the difference in lengths * towards the score. * To illustrate:letterDistance("house", "fly") = dist("h", "f") + dist("o", "l") + dist("u", "y") + dist(house.length, fly.length) * = |104 - 102| + |111 - 108| + |117 - 121| + |5 - 3| * = 2 + 3 + 4 + 2 * = 11 * Always start comparing the two strings from their first letter. * Excess letters are not counted towards distance. * Capital letters are included. */ int letterDistance(std::string str1, std::string str2) { // find the smaller string length int min = (str1.size()