#yuki_433

n,k=map(int,raw_input().split())
s=[[0 for i in xrange(5)] for j in xrange(n)]
for i in xrange(n):
 s[i][0],s[i][1],s[i][2]=map(int,raw_input().split())
 s[i][3]=0
 s[i][4]=i
t=sorted(s,key=lambda x:(x[0],-x[3],-x[1]),reverse=True)
u_cnt={}
for i in xrange(n):
 u_cnt[t[i][3]]=0
res=[]
while len(t)>0:
 res.append(t[0][4])
 for i in xrange(len(t)):
  if t[i][2]==t[0][2]:
   t[i][3]+=1
 t=t[1:]
 t=sorted(t,key=lambda x:(x[0],-x[3],-x[1]),reverse=True)
res=res[:k]
for i in xrange(len(res)):
 print res[i]