. >> reporter: in october, sosaki won the top prize for assistant product ideas. her idea was an artificial arm with an easy adjustment for length. >> translator: i want themm people who feel like giving up. i aim to come up with products they can use. >> reporter: in high school she was on the track team and planned to become, she changed at her mind at a college recruiting event where she heard of the program to train prostsis. >> i made the decision in an innocent and changed my major. >> reporter: she rarely uses her prosthetic arm in her daily life. having grown used to her natural arm she doesn't experience it as an inconvenience. in college, though, she found certain tasks required two hands. >> translator:r: i couldn't do some t things because i hadad te two hands.s. fofor instance, hololding an ob in o one hand and hitting it wi the other. at first, i'd ask my friends for help, but my teachers told me that was wrong. they insisted i had to be able to do the job myself. i got the point. >> reporter: her own condition gave her insight into the difficulties