package main

import (
    "fmt"
    "os"
    "strconv"
)

func main() {
    str := os.Args[1]

    current := str[0]
    count := 1
    result := string(current)

    for i, length := 0, len(str); i < length; i++ {
        if current == str[i] {
            count++
        } else {
            if count != 1 {
                result += strconv.Itoa(count)
            }

            current = str[i]
            count = 1
        }

        if count == 1 {
            result += string(current)
        }
    }

    fmt.Printf("input data: %s\n", str)
    fmt.Printf("result: %s\n", result)
}