1. Consider the following program:

Procedure xyz(n, first, second, third)

if n<=1 then

print(n, first, second, third)

else

print(n, first, second, third)

xyz(n-1, second, first, third)

xyz(n-1, third, second, first)

endif

Write the output of the following program when xyz(3, 1, 2, 3) is called.