1
15 symbols pyth
Sun Jun 4 03:04:20 2017 Sait2000
Jwhf}z._T+RJ._z
2
16 symbols pyth
Sun Jun 4 02:57:01 2017 Sait2000
Jw+hf}z._+TJ._zJ
3
17 symbols pyth
Sun Jun 4 02:54:12 2017 Sait2000
Jw+hfq<+TJlzz._zJ
4
19 symbols pyth
Sun Jun 4 02:53:47 2017 Sait2000
Jw+hfq<+TJlzz+k._zJ
5
79 symbols python3
Sun Jun 4 03:11:15 2017 Sait2000
a=input();b=input();r=i=0;
while not r:r=a[:i]+b;r*=r[:len(a)]==a;i+=1
print(r)