w=io.read()
t={}
for i=1,#w do
    x=string.sub(w,i,i)
    t[x]=0
end
for i=1,#w do
    x=string.sub(w,i,i)
    t[x]=t[x]+1
end
even=true
for i=1,#w do
    x=string.sub(w,i,i)
    if t[x]%2~=0 then
        even = false
        break
    end
end
print(even and "Yes" or "No")