S = input()
n=int(input())
T = input()
n_s = len(S)
n_t = len(T)
dp = [[float("inf")]*(n_t+1) for i in range(n_s+1)]
for i in range(n_s):
    dp[i][0] = i
for j in range(n_t):
    dp[0][j] = j
for i in range(n_s):
    for j in range(n_t):
        dp[i+1][j+1] = min(dp[i][j]+1,dp[i+1][j]+1,dp[i][j+1]+1)
        if S[i] == T[j]:
            dp[i+1][j+1] = min(dp[i][j],dp[i+1][j+1])

ans=dp[n_s][n_t]

if n<ans:
    print("SUCCESS")

else:
    if ans==0:
        print("FAILURE")
        exit()
    if n%ans==0:
        print("SUCCESS")
    else:
        print("FAILURE")