PROGRAM  TESTADD;
VAR A,B,C,D,E,F,G,H:INTEGER;
PROCEDURE BLAH(Q,R:INTEGER; VAR S:INTEGER); EXTERNAL;
BEGIN
READ(A);
READ(B);
BLAH(A,B,C);
WRITE(C);WRITELN;
READ(E);
 BLAH(E,C,F);
WRITE(E);WRITELN;
READ(G);
BLAH(G,F,H);
WRITE(H);WRITELN;
END.