diff --git a/cmd/ir-tfidf/main.go b/cmd/ir-tfidf/main.go
index 66c4aae..0a1ed64 100644
--- a/cmd/ir-tfidf/main.go
+++ b/cmd/ir-tfidf/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/gslin/go-ir-playground/internal/artifact"
 	"github.com/gslin/go-ir-playground/internal/tokenizer"
@@ -10,11 +11,27 @@ import (
 func main() {
 	articles := artifact.Read("data/articles.json")
 
-	for _, article := range articles {
-		title_bag := tokenizer.Tokenize(article.Title)
-		body_bag := tokenizer.Tokenize(article.Body)
+	tokens := make(map[string][]string)
+	tf := make(map[string]map[string]int)
+	df := make(map[string]int)
 
-		fmt.Printf("title_bag = %v\n", title_bag)
-		fmt.Printf("body_bag = %v\n", body_bag)
+	for _, article := range articles {
+		str := article.Title + "\n" + article.Body
+
+		bag := tokenizer.Tokenize(str)
+		tokens[article.Id] = bag
+
+		// Init TF:
+		tf[article.Id] = make(map[string]int)
+
+		for _, w := range bag {
+			// Handle TF:
+			tf[article.Id][w] = strings.Count(str, w)
+
+			// Handle DF:
+			df[w] += 1
+		}
 	}
+
+	fmt.Println("TF & DF Built")
 }