3
a
a
a

Answer: Impossible

Input contains "english"

This problem is very easy!.
if N=1 output is  0;
if N=2 and first language=second language output is 0;
if N=2 and first language not = second language output "first"-"second" (fist and second - it's name of language)
If N>2 if there are two or many equal languages output "Impossible"
If N>2 if all languages different you print N and print all name languages this your language.
Your language it is thought up string of latin letters. But dangerous this it. your language will be string len<10 and latin letters in small case.

Tests:
input:
1
a
output:
0

input:
2
a
a
output:
0

input:
2
a
b
output:
a-b

input:
3
a
b
c
output:
a-qwerty
b-qwerty
c-qwerty

input:
3
a
a
b
output:
Impossible

Hello. What about test 15? Can you give it?

what answer on the test

input
5
eng
ru
ua
ger
ita

output
5
eng-qwedfgjk
ru-qwedfgjk
ua-qwedfgjk
ger-qwedfgjk
ita-qwedfgjk

is it correct????

input
2
a
a

output
Impossible

????

In test
3
english
english
english
My prog gave 0 and I got AC, but I should output "Impossible".
Am I right?
So... Shouldn't this test be added?

  Is it true, that if n=2 we need only one translator who know both languages from the input and it doesn't matter these languages are equal or not?
  And what is the answer for this test:
2
rus
rus
?



Edited by author 13.10.2007 17:56

please, give some tests

why WA on test 4?
what answer on test:
input.txt
2
a
b
???

Edited by author 08.10.2007 14:52

What should we output ? A single line containing 0 ?

How english appeared in sample? In such a way, I can use any combination of letters as a language?