The first and last occurrence

Statement

Given a string that may or may not contain a letter of interest. Print the index location of the first and last appearance of f. If the letter f occurs only once, then output its index. If the letter f does not occur, then do not print anything.

Don't use loops in this task.

In all the problems input the data using input() and print the result using print().

1
2
# Read an integer:
# a = int(input())
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Input:

1
comfort
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Output:

1
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Saved solutions

Tests

	Input	Correct answer
	comfort	3
	office	1 2
	hello
	fffffffffffffff	0 14
	aaaaaaaaaaaaaaaaaaaaafaaaaaaaaaaaaaaaaaaaaaaaa	21
	aaaaaaaaaaaaaaaaaaaaaaaaffaaaaaaaaaaaaaaaaaaaa	24 25
	afafafafafafafa	1 13