/*
Package strand handles DNA and RNA strands.
*/
package strand
var toRNA = map[string]string{
	"G": "C",
	"C": "G",
	"T": "A",
	"A": "U",
}
// ToRNA converts DNA string to RNA string.
func ToRNA(dna string) (rna string) {
	for _, v := range dna {
		rna += toRNA[string(v)]
	}
	return
}