Let's introduce the designation , where x is a string, n is a positive integer and operation " + " is the string concatenation operation. For example, [abc, 2] = abcabc . We'll say that string s can be obtained from string t , if we can remove some characters from string t and obtain string s . For example, strings ab and aсba can be obtained from string xacbac , and strings bx and aaa cannot be obtained from it. Sereja has two strings, w = [a, b] and q = [c, d]. He wants to find such maximum integer p (p 0), that [q, p] can be obtained from string w .

输入描述:

The first line contains two integers b, d(1 ≤ b, d ≤ 107). The second line contains string a. The third line contains string c. The given strings are not empty and consist of lowercase English letters. Their lengths do not exceed 100.

输出描述:

In a single line print an integer — the largest number p. If the required value of p doesn't exist, print 0.