push 1
use print(1)
try(8)
push var
push 1
push 3
use +(2)
use =(2)
catch(10)
push 2
use print(1)
try(19)
push var
push "x"
push 3
use +(2)
use =(2)
push 3
use print(1)
catch(21)
push 4
use print(1)