i-pin iiiii iiuni inini inipi inniu inrun inurn ipini irinn irpin irupi n-p-n niiip ninur nipin nippu nipri nipup nu-nu nunni nunun nupur nurin nurri nurun p-n-p piiri pinin pinn- pinni pinup pippi pipri pirin pirni pirri pirui piuri piuru pruin prun- pruni pupin pupri purin puuri ripup rirpu ruiru runin runup rupin u-n-i u-nii unini uninn unipi unnun unnur unpin unrip unrun unurn uprun urin- urpin ururi uuuuu