Description

• Write a program that asks the user for a two-digit number (10 ~ 99), then prints the English word for the number.
• Break the number into two digits.
• Use a switch statement to print the word for the first digit (i.e. twenty, thirty, etc).
• Use another switch statement to print the second digit.
• Deal with special cases: 11~19.
• If not a double digit number, print "invalid\n".

 

Input

0 < n <= 99

Output

• A string of characters.
• Or two strings of characters separated by a hyphen "-" character.

Sample Input  Download

Sample Output  Download

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