A public class CL01 implements IF005 {private final Object op1(Object o){return new Object();}public String cat(String s1,String s2){return s1+s2;}}
B public class CL02 implements IF005 {public final String op1(Object o) {return ʹʹʹʹ;}public String cat(String a,String b) {return ʹʹʹʹ;}}
C public class CL03 implements IF005 {public Object op1(String s) {return ʹʹʹʹ;}public String cat(String a,String b) {return ʹʹʹʹ;}}
D public class CL04 implements IF005 {protected String op1(Object s) {return ʹʹʹʹ;}public String cat(String a,String b) {return ʹʹʹʹ;}}
E public class CL05 implements IF005 {Object op1(Object o) {return ʹʹʹʹ;}String cat(String a,String b) {return ʹʹʹʹ;}}