Bank Number Generator

package main

import "fmt"

func main() {
    var a, e, n int
    var x, y, z string
    fmt.Scanln(&a)
    fmt.Scanln(&x)
    fmt.Scanln(&y)
    fmt.Scanln(&z)
    fmt.Scanln(&e)
    fmt.Scanln(&n)

    b := int(x[0])
    c := int(y[0])
    d := int(z[0])

    for i := a; i <= 99; i++ {
        for j := b; j <= 'Z'; j++ {
            for k := c; k <= 'z'; k++ {
                for l := d; l <= 'Z'; l++ {
                    for m := e; m >= 10; m-- {
                        if i % 10 == 2 && m % 10 == 5 {
                            n--
                            if n == 0 {
                                fmt.Printf("%d%c%c%c%d\n", i, j, k, l, m)
                                return
                            }
                        }
                    }
                }
            }
        }
    }
}