5u+252f5 \mathrm{u}+\frac{25}{2} \mathrm{f}5u+225f
u+92f\mathrm{u}+\frac{9}{2} \mathrm{f}u+29f
u+52fu+\frac{5}{2} fu+25f
5u+92f5 u+\frac{9}{2} f5u+29f