Nuclear Fusion

Description:

Input:

The first line contains two integers n and k (1 ≤ k ≤ n ≤ 17). The second line contains space-separated symbols of elements of n atoms, which are available from the start. The third line contains space-separated symbols of elements of k atoms which need to be the result of the fusion. The symbols of the elements coincide with the symbols from the periodic table of the chemical elements. The atomic numbers do not exceed 100 (elements possessing larger numbers are highly unstable). Some atoms can have identical numbers (that is, there can be several atoms of the same element). The sum of numbers of initial atoms is equal to the sum of numbers of the atoms that need to be synthesized.

Output:

If it is impossible to synthesize the required atoms, print "NO" without the quotes. Otherwise, print on the first line «YES», and on the next k lines print the way of synthesizing each of k atoms as equations. Each equation has the following form: "x₁+x₂+...+x_t->y_i", where x_j is the symbol of the element of some atom from the original set, and y_i is the symbol of the element of some atom from the resulting set. Each atom from the input data should occur in the output data exactly one time. The order of summands in the equations, as well as the output order does not matter. If there are several solutions, print any of them. For a better understanding of the output format, see the samples.

Sample Input:

10 3
Mn Co Li Mg C P F Zn Sc K
Sn Pt Y

Sample Output:

YES
Mn+C+K->Sn
Co+Zn+Sc->Pt
Li+Mg+P+F->Y

Sample Input:

2 1
H H
He

Sample Output:

YES
H+H->He

Sample Input:

2 2
Bk Fm
Cf Es

Sample Output:

NO

Note:

The reactions from the first example possess the following form (the atomic number is written below and to the left of the element):

To find a periodic table of the chemical elements, you may use your favorite search engine.

The pretest set contains each of the first 100 elements of the periodic table at least once. You can use that information to check for misprints.