program ABC044B
    implicit none
    integer(8)::i,flg
    character(100)::w
    integer(8),dimension(26)::C
    read(5,*)w
    flg=0
    C=0
    do i=1,len_trim(w)
        C(ichar(w(i:i))-96)=C(ichar(w(i:i))-96)+1
    end do

    do i=1,26
        if(mod(C(i),2)==1)then
            flg=1
            exit
        end if
    end do

    if(flg==0)print'(A)',"Yes"
    if(flg==1)print'(A)',"No"
end program ABC044B