如何去掉行名中的第一个字母

public class RemoveFirstLetter {
    public static void main(String[] args) {
        String input = "行名";
        String result = removeFirstLetter(input);
        System.out.println(result);
    }

    public static String removeFirstLetter(String input) {
        if (input == null || input.length() <= 1) {
            return input;
        }
        return input.substring(1);
    }
}

def remove_first_letter(input):
    if input is None or len(input) <= 1:
        return input
    return input[1:]

input = "行名"
result = remove_first_letter(input)
print(result)