One is that we have to look at the scenarios that is the first thing we need to do and the scenario is that whether s2 is a sub string of s1, so it will display that it is sub a string.
एक सिनॅरिओ असू शकतो कि s2, s1 ची सबस्ट्रिंग आहे, आणि फंक्शन "सबस्ट्रिंग आहे" असे दाखवेल.