package main
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import "fmt"
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func message() string {
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m := ""
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arr := [4]int{1, 2, 3, 4}
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for i := 0; i < len(arr); i++ {
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arr[i] *= arr[i]
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m += fmt.Sprintf("%v: %v\n", i, arr[i])
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}
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return m
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}
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func main() {
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fmt.Print(message())
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}
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