Main Page $$ Exercises $CSBS5$ Python $$ Solve $an$ Exercise

$(1)$ You are working on problem set: $CSBS5($O$\text{'}$Pause$)$

line $1$

line $2$

line $3$

line $4$

reference$\_$mystery$1$

Language$/$Type:

Python parameters reference semantics

When the main function below is called, the following code produces $4$ lines of output. Write each line of output below as it would appear on the console.

def mystery $(a,x,y)$ :

If $x+=1a[x]=17a[y]=17y,ay=1x=3y,x(x,y,a)x=y-1(a,y,x)(x,y,a)$