public class RnaTranscription {
public String transcribe(String dnaStrand) {
StringBuilder sb = new StringBuilder();
for (char c : dnaStrand.toCharArray()) {
switch (c) {
case 'A':
sb.append('U');
break;
case 'G':
sb.append('C');
break;
case 'C':
sb.append('G');
break;
case 'T':
sb.append('A');
break;
}
}
return sb.toString();
}
}