Penmanship

The cows are learning to write longhoof. Because their hooves are
so large, they use incredibly large pens. These pens weigh quite a
lot, and so the cows typically don't lift their pens between words
like people do. As a result the letters in the words all run together,
with no spaces.

Farmer Christine wants to read what her cows have written.  Given
something a cow wrote (at most 80 characters long) and a dictionary of
at most 1000 cow words, determine where to insert spaces in the cow's
writing so that each word in the sentence is in the dictionary. If
there are multiple ways to insert spaces, print "ambiguous" on a
single line. There will always be at least one way to break the
message into words.

PROBLEM NAME: pen

INPUT FORMAT:

* Line 1: What the cow wrote (up to 80 upper-case letters, with no
        spaces).

* Line 2: A single integer N, the number of words in the cow
        dictionary.

* Lines 3..N+2: N lines, each with a single word in the cow
        dictionary. Words contain only upper-case letters and are at
        most 10 letters long.

SAMPLE INPUT:

THESEPENSSUREAREHEAVY
14
ARE
BARN
FARMER
HEAVY
IS
JOHN
LIGHT
MILK
MOO
PENS
SURE
THESE
UNDER
USACO

INPUT DETAILS:

The cow wrote "THESEPENSSUREAREHEAVY".  Farmer John has 14 words in his cow
dictionary.

OUTPUT FORMAT:

* Line 1: The cow's message, with spaces inserted so that each word is
        from the dictionary, or the string "ambiguous".

SAMPLE OUTPUT:

THESE PENS SURE ARE HEAVY