PROGRAM P1;
CONST I=5, B=20; C=1, D=2;
VAR I; X,Y;
PROCEDURE J;
BEGIN
  X:=B
END;
PROCEDURE K;
BEGIN
  Y:=C
END;
BEGIN
  I:=10;
  WHILE I>0 DO
    BEGIN
      BEGIN
      END;
      WRITE(I);
      I:=I-1
    END
END.