n = io.read("*n")
t = {}
a = {720, 360, 180, 30, 6, 1}
b = {"C", "M", "S", "R", "o", "."}
for i = 1, 6 do
  while a[i] <= n do
    table.insert(t, b[i])
    n = n - a[i]
  end
end
print(table.concat(t))