       PROGRAM POOR

       INTEGER A(3),C
       READ(*,*) A(1),A(2),A(3)

       IF(A(1).EQ.A(2).AND.A(1).NE.A(3)) THEN
         WRITE(*,*) "yes"
         STOP
       ENDIF

       IF(A(1).EQ.A(3).AND.A(1).NE.A(2)) THEN
         WRITE(*,*) "yes"
         STOP
       ENDIF

       IF(A(2).EQ.A(3).AND.A(1).NE.A(2)) THEN
         WRITE(*,*) "yes"
         STOP
       ENDIF

       WRITE(*,*) "no"

       STOP
       END
