help in writing a code in MARIE

hi, i just start learning the marie program
and i have a problem writing this code in marie
especially the condition
i couldn't figure out how to do it

if (x<y+z)
{
x=x-y;
z=z+1
}
else y=y-1


my labels are:
x, Dec 5
y, Dec 2
z, Dec 5
one, Dec 1