N,M = map(int,input().split())
santa = []

for i in range(1,N+1):
    point = i//2+1
    get_p = 1
    m = M
    tmp = santa[:]
    
    for j in range(len(santa)):
        if tmp[j]==-1:
            tmp[j]=0
            get_p+=1
        elif tmp[j]==0:
            tmp[j]=1
            get_p+=1
            m-=1
        else:
            tmp[j]=0
    
    num = 1
    while get_p<point:
        for j in range(len(tmp)-1,-1,-1):
            if tmp[j]==0 and santa[j]==num:
                tmp[j] = num+1
                m -= num+1
                get_p+=1
                break
        else:
            num+=1

    while get_p>point:
        for j in range(get_p-point):
            max_m = max(tmp)
            tmp[tmp.index(max_m)]=0
            get_p-=1
            m+=max_m
    if m<0:
        santa.insert(0,-1)
    else:
        santa = [m]+tmp[:]

print(*santa)