Fix #58: don't calc when input.length <= 2
Fix #58: don't calc when input.length <= 2

apprentice3d/Wox,kdar/Wox,shangvven/Wox,kayone/Wox,EmuxEvans/Wox,mika76/Wox,vebin/Wox,EmuxEvans/Wox,danisein/Wox,dstiert/Wox,mika76/Wox,kdar/Wox,danisein/Wox,yozora-hitagi/Saber,gnowxilef/Wox,shangvven/Wox,lances101/Wox,zlphoenix/Wox,shangvven/Wox,kayone/Wox,Launchify/Launchify,derekforeman/Wox,qianlifeng/Wox,apprentice3d/Wox,JohnTheGr8/Wox,AlexCaranha/Wox,dstiert/Wox,derekforeman/Wox,jondaniels/Wox,18098924759/Wox,medoni/Wox,Megasware128/Wox,qianlifeng/Wox,derekforeman/Wox,renzhn/Wox,kdar/Wox,mika76/Wox,kayone/Wox,18098924759/Wox,lances101/Wox,vebin/Wox,yozora-hitagi/Saber,gnowxilef/Wox,sanbinabu/Wox,dstiert/Wox,jondaniels/Wox,Wox-launcher/Wox,AlexCaranha/Wox,medoni/Wox,18098924759/Wox,EmuxEvans/Wox,renzhn/Wox,Megasware128/Wox,sanbinabu/Wox,zlphoenix/Wox,AlexCaranha/Wox,gnowxilef/Wox,Wox-launcher/Wox,qianlifeng/Wox,Launchify/Launchify,JohnTheGr8/Wox,sanbinabu/Wox,apprentice3d/Wox,vebin/Wox