def solution(my_string, num1, num2):
a = list(map(str,my_string))
b = a[num1]
a[num1] = a[num2]
a[num2] = b
return ''.join(a)
def solution(my_string, num1, num2):
s = list(my_string)
s[num1],s[num2] = s[num2],s[num1]
return ''.join(s)