public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String line = null;
String[] split = null;
int cases = Integer.valueOf(reader.readLine());
int N, j, z, min, max, result;
String matching = null, newMatch = null, tmpLine;
Set<String> set = new HashSet<String>();
boolean noResult = false;
for (int i = 1; i <= cases; i++) {
N = Integer.valueOf(reader.readLine());
set = new HashSet<String>();
noResult = false;
result = 0;
min = Integer.MAX_VALUE;
max = Integer.MIN_VALUE;
for (z = 0; z < N; z++) {
line = reader.readLine();
tmpLine = REGEX_PATTERN.matcher(line).replaceAll("$1");
if (set.isEmpty()) {
set.add(tmpLine);
} else if (!set.contains(tmpLine)) {
noResult = true;
break;
}
min = Math.min(min, line.length());
max = Math.max(max, line.length());
}
if (!noResult) {
result = max - min;
}
if (noResult) {
System.out.printf("Case #%d: Fegla Won%n", i);
} else {
System.out.printf("Case #%d: %d%n", i, result);
}
}
}
