Design a computer program that could generate the set of "Crypt Addition" problems. (See Exercise 3–5.)

Exercise 3–5

Assign a decimal digit to each of the letters in the words "send," "more," and "money," such that when the letters are replaced by the corresponding digits the following summation is true:

No digit may be assigned to more than one letter, and leading zeros are not allowed in the numbers formed by "send," "more," and "money."

send + more money