import org.jetbrains.annotations.NotNull;

class Node {
    String getType() { return ""; }

    String foo(Node left, Node right) {
        String leftType = newMethod(left.getType());
        String rightType = newMethod(right.getType());

        String type = newMethod("A");
        return leftType + rightType + type;
    }

    @NotNull
    private String newMethod(String type2) {
        return type2.substring(1);
    }
}