def gridSearch(G, P):
    pattern_len = len(P)
    single_pattern_len = len(P[0])
    
    patter_index = None
    for c, row in enumerate(G):
        
        row_temp = row
        pattern_row_index, pattern_col_index = c, 0
        while P[0] in row_temp:
            patter_index = row_temp.index(P[0])
            pattern_col_index += patter_index

            is_match = True
            for i in range(1, pattern_len):
                if G[pattern_row_index+i][pattern_col_index:][:single_pattern_len] != P[i]:
                    is_match = False
                    break
            pattern_col_index += 1
            row_temp = row_temp[patter_index+1:]
            if is_match: return "YES"
    return "NO"