P, N = map(int, input().split())
import sys
sys.setrecursionlimit(10**9)
def f(x):
    if x==0 or x==6 or x==9:
        return 6
    elif x==1:
        return 2
    elif x==2 or x==3 or x==5:
        return 5
    elif x==4 or x==7:
        return 4
    elif x == 8:
        return 7
    elif x >= 10:
        return f(x//10)+f(x%10)
    else:
        return 1 + f(-x)

n = [list() for _ in range(10)]
for i in range(10):
    x = i
    n[i].append(x)
    while 1:
        y = f(x)
        if y == x:
            break
        else:
            n[i].append(y)
            x = y

for i in range(min(N, 5*10**6)):
    if len(str(P)) == 1:
        id = i
        break
    P = f(P)
else:
    print(P)
    exit()
left = N - id
print(n[P][i] if N-id<=(len(n[P])-1) else n[P][-1])