Create a program that converts a phone number with letters to one with only numbers.
| Number | Letter |
|---|---|
| 0 | none |
| 1 | none |
| 2 | ABC |
| 3 | DEF |
| 4 | GHI |
| 5 | JKL |
| 6 | MNO |
| 7 | PQRS |
| 8 | TUV |
| 9 | WXYZ |
text_to_num("123-647-EYES") ➞ "123-647-3937"
text_to_num("(325)444-TEST") ➞ "(325)444-8378"
text_to_num("653-TRY-THIS") ➞ "653-879-8447"
text_to_num("435-224-7613") ➞ "435-224-7613"
XXX-XXX-XXXX or (XXX)XXX-XXXX, using numbers and capital letters.