forward function M(integer n)

function F(integer n)
    return iff(n?n-M(F(n-1)):1)
end function

function M(integer n)
    return iff(n?n-F(M(n-1)):0)
end function

for i=0 to 20 do
    printf(1," %d",F(i))
end for
printf(1,"\n")
for i=0 to 20 do
    printf(1," %d",M(i))
end for