import sys
input = lambda:sys.stdin.readline().strip()

n,k=map(int,input().split())
a=sorted(list(map(int,input().split())))
res=0
for j in range(len(a)-1,-1,-1):
    ans=a[j]
    for i in range(0,j):
        if a[j] - a[i] <= k:ans+=a[i]
    res=max(res,ans)
print(res)