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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
class UseTrim {
public static void main(String args[]) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String str;
System.out.println("Enter 'stop' to quit.");
System.out.println("Enter letter: ");
do {
str = br.readLine();
str = str.trim();
if (str.equals("I"))
System.out.println("I");
else if (str.equals("M"))
System.out.println("M");
else if (str.equals("C"))
System.out.println("C.");
else if (str.equals("W"))
System.out.println("W");
} while (!str.equals("stop"));
}
}
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