"You are searching."
The verb is keres. Historically, -ik verbs used -el/ol/öl, others used -sz, but it changed, & now "sibilant ending" verbs take -ol/el/öl (ending with -s, -sz, -z, -dz, & similar sounds, I guess, if there such words to begi with.)
This should be added to the tips and notes. There is a no chance someone that read the current Tips and Notes section will have a chance to get this question right.