Given two strings str1 and str2, find the length of the shortest string which has both str1 and str2 as subsequences. Suppose str1 = abcd and str2 = xycd, then the length of the shortest string which has both str1 and str2 as subsequences will be 6 . These strings can be abxycd, xyabcd etc. Coding Window 12s1=input()s2=input()