For line no 7 & 9, SYSPRINT display does not SKIP to 3rd line. Instead I’m getting in SYSPRINT as below:

1HELLO 1 !
-HELLO 1 !
3 4 5
-X= 3 Y= 4 Z= 5;

Why SKIP(n) is not working as expected (should SKIP to nth line from current line)? What is the 1, – signs at the beginning of the lines in SYSPRINT?

000001  PROG: PROC OPTIONS(MAIN);               
000002         DCL (X,Y,Z)  FIXED BIN(15,0);    
000003         X=3;                             
000004         Y=4;                             
000005         Z=5;                             
000006         PUT LIST('HELLO 1 !');           
000007         PUT SKIP(3) LIST('HELLO 1 !');   
000008         PUT LIST(X,Y,Z) SKIP;            
000009         PUT DATA(X,Y,Z) SKIP(3);         
000010  END PROG;