diff --git a/main.go b/main.go
index eeeb865..4a08bc9 100644
--- a/main.go
+++ b/main.go
@@ -106,7 +106,7 @@ func main() {
 	}
 
 	var vig = &cobra.Command{
-		Use:   "vig mode -c [cipher] -k [key] -i [input]",
+		Use:   "vig",
 		Short: "vignenere cipher",
 		Long:  `perform vigenere cipher`,
 		Run: func(cmd *cobra.Command, args []string) {
@@ -122,6 +122,19 @@ func main() {
 		},
 	}
 
+	var guess = &cobra.Command{
+		Use:   "guess",
+		Short: "guess cipher",
+		Long:  `will try to guess ceasar cipher`,
+		Run: func(cmd *cobra.Command, args []string) {
+			if len(args) < 1 {
+				fmt.Println("missing input, see -h (--help) for more info")
+				os.Exit(1)
+			}
+			psyfer.Guess()
+		},
+	}
+
 	var random = &cobra.Command{
 		Use:   "random",
 		Short: "randomly transpose",
@@ -236,7 +249,7 @@ func main() {
 	)
 
 	var rootCmd = &cobra.Command{Use: "app"}
-	rootCmd.AddCommand(sub, aes, trans, vig)
+	rootCmd.AddCommand(sub, aes, trans, vig, guess)
 	trans.AddCommand(random, railfence, split)
 	rootCmd.Execute()
 }
diff --git a/psyfer/guess.go b/psyfer/guess.go
new file mode 100644
index 0000000..2eb1738
--- /dev/null
+++ b/psyfer/guess.go
@@ -0,0 +1,79 @@
+package psyfer
+
+import (
+	"fmt"
+	"math"
+	"sort"
+)
+
+var charFreq = []float64{
+	0.080,
+	0.015,
+	0.030,
+	0.040,
+	0.130,
+	0.020,
+	0.015,
+	0.060,
+	0.065,
+	0.005,
+	0.005,
+	0.035,
+	0.030,
+	0.070,
+	0.080,
+	0.020,
+	0.002,
+	0.065,
+	0.060,
+	0.090,
+	0.030,
+	0.010,
+	0.015,
+	0.005,
+	0.020,
+	0.002,
+}
+
+func pc(position, i int) int {
+	if position-i < 0 {
+		return 26 - (int(math.Abs(float64((position - i) % 26))))
+	} else {
+		return int(math.Abs(float64((position - i) % 26)))
+	}
+}
+
+func (p phi) String() string {
+	return fmt.Sprintf("%d %f\n", p.position, p.value)
+}
+
+type phi struct {
+	position int
+	value    float64
+}
+
+type allPhi []phi
+
+func (p allPhi) Len() int           { return len(p) }
+func (p allPhi) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
+func (p allPhi) Less(i, j int) bool { return p[i].value < p[j].value }
+
+func Guess() {
+	fmt.Println((6 - 7) % 26)
+	total := []phi{}
+	for i := 0; i < 26; i++ {
+		a := 0.0
+		a += 0.1 * charFreq[pc(6, i)]
+		a += 0.1 * charFreq[pc(7, i)]
+		a += 0.1 * charFreq[pc(10, i)]
+		a += 0.3 * charFreq[pc(14, i)]
+		a += 0.2 * charFreq[pc(17, i)]
+		a += 0.1 * charFreq[pc(20, i)]
+		a += 0.1 * charFreq[pc(25, i)]
+		p := phi{i, a}
+		total = append(total, p)
+	}
+	fmt.Println(total)
+	sort.Sort(allPhi(total))
+	fmt.Println(total)
+}