package main

import (
    "fmt"
    "math/big"
)

func main() {
    cur := big.NewInt(1)
    curSq := big.NewInt(1)
    var curSqLen int
    for {
        curSqStr := curSq.String()
        curSqLen = len(curSqStr)
        if curSqLen > 10 {
            break
        }
        if curSqLen == 10 {
            setOfDigits := map[byte]bool{}
            for i := 0; i < 10; i++ {
                setOfDigits[curSqStr[i]] = true
            }
            if len(setOfDigits) == 10 {
                fmt.Println(curSqStr)
            }
        }
        cur.Add(cur, big.NewInt(1))
        curSq.Mul(cur, cur)
    }
}