# Sum in loop
t = int(input())
for i in range (t):
s=input()
ns = s.split ()
a, b = int (ns[0]), int(ns[1])
sm = a + b
print (sm,end="")
IyBTdW0gaW4gbG9vcAp0ID0gaW50KGlucHV0KCkpCmZvciBpIGluIHJhbmdlICh0KToKCXM9aW5wdXQoKQoJbnMgPSBzLnNwbGl0ICgpCglhLCBiID0gaW50IChuc1swXSksIGludChuc1sxXSkKCXNtID0gYSArIGIKCXByaW50IChzbSxlbmQ9IiIp