START
x is  0 
y is  0 
y is  1 
x is  1 
y is  0 
y is  1 
x is  2 
y is  0 
y is  1 
x is  3 
y is  0 
y is  1 
x is  4 
y is  0 
y is  1 
x is  5 
y is  0 
y is  1 
x is  6 
y is  0 
y is  1 
x is  7 
y is  0 
y is  1 
x is  8 
y is  0 
y is  1 
x is  9 
y is  0 
y is  1 
x is  10 
y is  0 
y is  1 
x is  11 
y is  0 
y is  1 
x is  12 
y is  0 
y is  1 
x is  13 
y is  0 
y is  1 
x is  14 
y is  0 
y is  1 
x is  15 
y is  0 
y is  1 
x is  16 
y is  0 
y is  1 
x is  17 
y is  0 
y is  1 
x is  18 
y is  0 
y is  1 
x is  19 
y is  0 
y is  1 
x is  20 
y is  0 
y is  1 
x is  21 
y is  0 
y is  1 
x is  22 
y is  0 
y is  1 
x is  23 
y is  0 
y is  1 
x is  24 
y is  0 
y is  1 
END
