       PROGRAM POOR
C
       INTEGER A(3),C
       READ(*,*) A(1),A(2),A(3)
C
       IF(A(1).EQ.A(2).AND.A(1).NE.A(3)) THEN
         WRITE(*,*) "yes"
         STOP
       ENDIF
C
       IF(A(1).EQ.A(3).AND.A(1).NE.A(2)) THEN
         WRITE(*,*) "yes"
         STOP
       ENDIF
C
       IF(A(2).EQ.A(3).AND.A(1).NE.A(2)) THEN
         WRITE(*,*) "yes"
         STOP
       ENDIF
C
       WRITE(*,*) "no"
C
       STOP
       END
