/*
procedure Quantita_Ipod(in:N,M,Ipod_Negozio,Ipod_Magazzino;     out:Ipod_Totale)
    var M,N,i_totale: integer
    var Ipod_Negozio:   array(1..M,1..2) of integer
    var Ipod_Magazzino: array(1..N,1..2) of integer
    var Ipod_Totale:    array(1..M+N,1..2) of integer
begin
    while(i<M && j<N) do
	    if(Ipod_Negozio[i][1]==Ipod_Magazzino[j][1]) then
	        Ipod_Totale[i_totale][0]:=Ipod_Magazzino[j][0]+Ipod_Negozio[i][0]
            Ipod_Totale[i_totale][1]:=Ipod_Magazzino[j][1]
		    i:=i+1
		    j:=j+1
		else if(Ipod_Magazzino[j][1]<Ipod_Negozio[i][1]) then
			Ipod_Totale[i_totale][0]:=Ipod_Magazzino[j][0]
            Ipod_Totale[i_totale][1]:=Ipod_Magazzino[j][1]
			j:=j+1
		else
		    Ipod_Totale[i_totale][0]:=Ipod_Negozio[j][0]
            Ipod_Totale[i_totale][1]:=Ipod_Negozio[j][1]
			i:=i+1
		endif
		i_totale:=i_totale+1
	end while

	while(i<M) do
	    Ipod_Totale[i_totale][0]:=Ipod_Negozio[j][0]
        Ipod_Totale[i_totale][1]:=Ipod_Negozio[j][1]
        i:=i+1
	end while

	while(j<N) do
        Ipod_Totale[i_totale][0]:=Ipod_Magazzino[j][0]
        Ipod_Totale[i_totale][1]:=Ipod_Magazzino[j][1]
        j:=j+1
	end while
end

program esercizio_3
    var M,N: integer
    var Ipod_Negozio:   array(1..M,1..2) of integer
    var Ipod_Magazzino: array(1..N,1..2) of integer
    var Ipod_Totale:    array(1..M+N,1..2) of integer
begin
    read M,N
    for i:=0,M do
        read Ipod_Negozio[i][0]
        read Ipod_Negozio[i][1]
    endfor
    for i:=0,N do
        read Ipod_Negozio[i][0]
        read Ipod_Negozio[i][1]
    endfor

    Quantita_Ipod(N,M,Ipod_Negozio,Ipod_Magazzino,Ipod_Totale)

    for i:=0,N+M do
        read Ipod_Totale[i][0]
        read Ipod_Totale[i][1]
    endfor
end

*/

#include <iostream>
using namespace std;
int M=3,N=3;
int i=0,j=0;
int mag[3][2]={
	{4,100},
	{2,101},
	{3,102}
};

int neg[3][2]={
	{5,100},
	{3,101},
	{2,102}
};

int main(int argc, char** argv) {
	while(i<M && j<N){
	    if(neg[i][1]==mag[j][1]){
	    	cout<<mag[j][0]+neg[i][0]<<" ";
	    	cout<<mag[j][1]<<endl;
		    i++;
		    j++;
		}else if(mag[j][1]<neg[i][1]){
			cout<<mag[j][0]<<" ";
			cout<<mag[j][1]<<endl;
			j++;
		}else {
		    cout<<neg[i][0]<<" ";
		    cout<<neg[i][1]<<endl;
			i++;
		}
	}
	while(i<M){
	   	cout<<neg[i][0]<<" "<<neg[i][1]<<endl;
		i++;
	}
	while(j<N){
	    cout<<mag[j][0]<<" "<<mag[j][1]<<endl;
		j++;
	}
	return 0;
}