import sys
from grid import *
from collections import defaultdict as DD
from collections import Counter as CT
from collections import deque as DQ
from functools import cmp_to_key as ck
from functools import cache
from itertools import combinations as comb
from itertools import product as prod
from itertools import cycle
E = enumerate

I = sys.stdin.read().strip().split('\n')
#G = [list(l) for l in I.split('\n')]
#W, H = grid_geom(G)

ans = 0

for i,x in E(I):
    print(i,x)

print(ans)