[백준] 20299

import sys
n,k,l=map(int,sys.stdin.readline().split())
cnt=0
tmp=[]
for _ in range(n):
    a,b,c=map(int, sys.stdin.readline().split())
    if a>=l and b>=l and c>=l :
        if a+b+c>=k : cnt+=1; tmp.append(a); tmp.append(b); tmp.append(c)
print(cnt)
print(*tmp)