def f(n):
    if n==1:
        return 2
    if n in [2,3,5]:
        return 5
    if n in [0,6,9]:
        return 6
    if n in [4,7]:
        return 4
    if n==8:
        return 7
    if n>=10:
        return f(n//10)+f(n%10)
    return 1+f(-n)
P,N = input().split()
if N=="0":
    ans = P
else:
    cnt = 1
    x = 0
    if P[0]=="-":
        x = 1
        for i in range(1,len(P)):
            x += f(int(P[i]))
    else:
        for i in range(len(P)):
            x += f(int(P[i]))
    cnt = 2
    if len(N)<=6:
        N= int(N)
        while cnt<=N:
            x = f(x)
            cnt += 1
    else:
        while True:
            y = f(x)
            if y==x:break
            x = y
    ans = x
print(ans)