// Package transpose...
package transpose
import (
	"strings"
)
// Transpose transposes input string slice.
func Transpose(input []string) []string {
	if len(input) == 0 {
		return []string{}
	}
	var longestLine int
	for _, line := range input {
		if len(line) > longestLine {
			longestLine = len(line)
		}
	}
	ret := make([]strings.Builder, longestLine)
	for i, line := range input {
		for k, ch := range line {
			ret[k].WriteString(strings.Repeat(" ", i-ret[k].Len()))
			ret[k].WriteRune(ch)
		}
	}
	r := make([]string, len(ret))
	for i := range ret {
		r[i] = ret[i].String()
	}
	return r
}