segmentation: OMG SWINE FLU
rank.candidate: OM GSWINEFLU OMG SW INEF LU OMG SWINE FLU OMG SWI NE FLU OMGSWINEFLU OMG SWI NEF LU OM GS WINE FLU OMGSWINE FLU OMG SWINE FL U OMG SWINEFLU OMGS WINE FLU OMGSWIN E FLU O MG SWINE FLU OMG SWI NEFL U OMG S WINEFLU OMG SW INE FLU OMGSWINEF LU O MGS WINE FLU OMG S WINE FLU OMG SW INEFLU