def bkt_combinari(n,k):
    lista=[0]
    def combinari(n,k):
        if len(lista)==k+1:
            for j in range(k):
                f.write(str(lista[j+1])+' ')
            f.write('\n')
        else:
            for i in range(lista[-1]+1,n+1):
                    lista.append(i)
                    combinari(n,k)
                    lista.pop(-1)
    combinari(n,k)
f=open('combinari.in')
text=f.read()
n=int(text.split()[0])
k=int(text.split()[1])
f.close()

f=open('combinari.out','w')
bkt_combinari(n,k)