2162. Modify this character with a single stroke to make eight other Katakana characters. フ

フ  Katakana "Hu"

They are:  

ス  Katakana "Su"

ヌ  Katakana "Nu" or The "Mata" radical - again, right hand

ワ  Katakana "Wa"

ク  Katakana "Ku" or the "Tsutsumigamae" radical - to wrap

カ  Katakana "Ka" or The "Chikara" radical - power

ヲ  Katakana "Wo"

ラ  Katakana "Ra"

マ  Katakana "Ma"