Expand String – K Characters

The program must accept three integers X, Y and K as the input. The program must form a string with lower case alphabets starting from the X^th alphabet to the Y^th alphabet in the English alphabet set. The program must stretch the string as short as possible so that the string contains at least K characters. A stretch is to repeat each character in a string the same number of times. Then the program must print the resulting string as the output.

Boundary Condition(s):
1 <= X < Y <= 26
1 <= K <= 1000

Input Format:
The first line contains X, Y and K separated by a space.

Output Format:
The first line contains the resulting string.

Example Input/Output 1:
Input:
1 5 13

Output:
aaabbbcccdddeee

Explanation:
Here X = 1, Y = 5 and K = 13.
1^st lower case alphabet is ‘a‘.
5^th lower case alphabet is ‘e‘.
So the string is formed as “abcde“.
Then the string is stretched as “aaabbbcccdddeee” whose length is 15 (13 <= 15).

Example Input/Output 2:
Input:
1 5 20

Output:
aaaabbbbccccddddeeee

Example Input/Output 3:
Input:
24 25 9

Output:
xxxxxyyyyy

X,Y,K=map(int,input().split())
String=" abcdefghijklmnopqrstuvwxyz"
temp=(Y-X)+1
while 1:
    if(K%temp==0):
        break
    else:
        K+=1
for index in range(X,Y+1):
    print(String[index]*(K//temp),end="")