Complete the code fragment below so that it displays on the same line the first alphabetic letter in str and the last digit in str. You may assume that str contains at least one alphabetic letter and at least one digit.

```
int fst_let, last_dig; /* positions of first letter, last digit */
char str[30];
int i;

printf("Enter a string> ");
scanf("%s", str);
```

```
for (fst_let = 0; !isalpha(str[fst_let]); ++fst_let);
for (last_dig = strlen(str) - 1;
!isdigit(str[last_dig]);
--last_dig);
]
printf("%c %c\n", str[fst_let], str[last_dig]);
```