restructure zeta/** to storage/zeta/**

storage/zeta/py/completed/29768.py

@@ -0,0 +1,17 @@
+class PalindromeGenerator:
+    def __init__(self, N, K):
+        self.N, self.K = N, K
+
+    def solve(self) -> str:
+        S = "abcdefghijklmnopqrstuvwxyz"
+        return "a" * (self.N - (self.K - 1)) + S[1 : self.K]
+
+
+if __name__ == "__main__":
+    # 3 1 => aaa
+    # N 1 =. a...a.
+    # 3 2 => aba
+    # 4 2 => aaab
+    # aaaaaaaaaaaaaaabc
+    N, K = map(int, input().split())
+    print(PalindromeGenerator(N, K).solve())