fixed empty string parse error
fixed empty string parse error

neilkumar101/CS169_SFVS,neilkumar101/CS169_SFVS,brokenfingers/SFVS,brokenfingers/SFVS,brokenfingers/SFVS,neilkumar101/CS169_SFVS,neilkumar101/CS169_SFVS