segmentation: i am so graceful
rank.candidate: iamso graceful iam sog race ful i amso graceful ia m so graceful i a ms o graceful iamsograc eful iamsogr ace ful iam so grace fu l iams o graceful iam so grace ful iam so graceful iam so gr ace ful i amsog race ful iam sogra ce ful iam so grace f ul i ams o graceful i am so graceful i a mso graceful iamsog race ful iams og race ful