A = 12

B = 7

A = B

A = 12

B = 7

A = B

B = 3

A = 12

B = 7

A = B

B = A

A = 12

B = 7

C = 5

A = B

B = C

A = 12

B = 7

A = A - B

A = 10

B = 3

C = 1

A = B - C

A = 12

B = A

C = B

A = B - C

Cat = "Tom"

Mouse = "Jerry"

A = "Tom"

B = Mouse