1. A + B
while True:
try:
a, b = map(int, input().split())
print(a + b)
except EOFError:
break
import sys
for line in sys.stdin:
a, b = map(int, line.split())
print(a + b)
2.A+B(2)
t = int(input())
for _ in range(t):
a, b = map(int, input().split())
print(a + b)
3.A+B(3)
while True:
a, b = map(int, input().split())
if a == b ==