"is a" accepts string only for right-hand op
"is a" accepts string only for right-hand op

trixter5/stylus,Ricardh522/stylus,ThiagoGarciaAlves/stylus,modulexcite/stylus,rstacruz/stylus,jameswomack/stylus,HossainKhademian/Stylus,angryrobot/stylus,jangarcia/stylus,behzad88/stylus,peterkinalex/stylus-1,Zagorakiss/stylus,stylus/stylus,yetone/stylus,meteor/stylus,tyv/stylus,jonpacker/stylus,galenvagen/stylus,Delapouite/stylus,silvaemota/stylus,johnnycopperstone/stylus,PeterWangPo/stylus,cemoulto/stylus,baotingfang/stylus,SimenB/stylus,a-x-/stylus