t = int(input())

for _ in range(t):
    h,w = list(map(int,input().split()))
    qy,qx = 1,1
    ky,kx = h,w
    
    while True:
        ky,kx = list(map(int,input().split()))
        
        if (ky,kx) == (0,0):
            break
        elif (ky,kx) == (-1,-1):
            exit()
        
        if (qy,qx) == (h-2,w-2):
            if ky == h:
                print(h-1,kx)
                qy,qx = h-1,kx
            elif kx == w:
                print(ky,w-1)
                qy,qx = ky,w-1
        
        elif qx == w-2:
            print(h-2,qx)
            qy,qx = h-2,qx
        
        elif qx == 1:
            print(1,w-2)
            qy,qx = 1,w-2