a = "successfully"
b = []
c = []
for i in range(26):
b.append(0)
for i in a:
if(b[ord(i)-97] == 0):
b[ord(i)-97] = 1
c.append(i)
d = ''.join(c)
print(d)
YSA9ICJzdWNjZXNzZnVsbHkiCmIgPSBbXQpjID0gW10KZm9yIGkgaW4gcmFuZ2UoMjYpOgogICAgYi5hcHBlbmQoMCkKZm9yIGkgaW4gYToKICAgIGlmKGJbb3JkKGkpLTk3XSA9PSAwKToKICAgICAgICBiW29yZChpKS05N10gPSAxCiAgICAgICAgYy5hcHBlbmQoaSkKZCA9ICcnLmpvaW4oYykKcHJpbnQoZCkK