(define (System.out.println x)
  (begin
    (display x)
    (newline)
  )
)

(define (^ x y)
  (let loop((i 0) (foo 1))
    (if (= i y)
        foo
        (loop (+ i 1) (modulo (* foo x) 10))
    )
  )
)

(let (
      (N (modulo (read) 10))
      (M (read))
     )
  (System.out.println (^ N M))
)