for _ in range(int(input())):
    N,M=map(int,input().split())
    _count=0
    X=1
    Y=1
    for _ in range(int(input())):
        _flag=True
        _in_x,_in_y=map(int,input().split())
        while _flag==True:
            if ((X+_in_x)<=N and (Y+_in_y)<=M) and (X+_in_x)>0 and (Y+_in_y)>0:
                _count+=1
                X+=_in_x
                Y+=_in_y
                print("{},{}".format(X,Y))
            else:
                _flag=False
    print(_count)

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MQo1IDYKMwoxIDEKMSAxCjAgLTQ=

1
5 6
3
1 1
1 1
0 -4