import time
import itertools
import collections
from functools import reduce
from functools import wraps
from collections import defaultdict
# import pdb; pdb.set_trace()
from operator import add

def fn(*args, **kwargs):
    m, n = map(int, input().split())
    a = []
    for i in range(m):
        a.append(input().split())
    a = list(map(int, reduce(add, a)))
    
    ans_lst = []
    for i, _ in enumerate(a, 1):
        for perm in itertools.permutations(a, r=i):
            enum = reduce(lambda x, y: x + y, perm)
            ans_lst.append(enum)
    ans = max(list(filter(lambda x: n >= x, ans_lst)))
    print(ans)
    #return ans

if __name__ == "__main__": fn()