Alex’s keyboard has two troublesome keys:

1. A silly key that always types the same wrong letter.
2. A quiet key that produces no output.

• Alex presses the silly key at least once.
• Alex may or may not press the quiet key.
• The two keys are never pressed consecutively.

You are given two lines:

1. The sequence of keys pressed.
2. The text shown on screen.

Output:

• Line 1: silly key and the letter it types (space-separated).
• Line 2: quiet key or - if none.

Sample Input

forloops
fxrlxxps

Sample Output

o x
-