def pow(a,b,mod=1)
  r=1
  while b>0
    r*=a if b&1>0
    r%=mod if r>=mod
    a*=a
    a%=mod if a>=mod
    b>>=1
  end
  r
end
def nCr(n,r,mod)
  return 0 if n<r
  (1..r).inject((1..r).inject(1){|s,i|(s*((n-i+1)%mod))%mod}){|s,i|(s*pow(i,mod-2,mod))%mod}
end
mod=1000000007
gets
a=gets.split.group_by{|i|i}
p nCr(a.size,3,mod)*a.inject(1){|s,(k,v)|(s*v.size)%mod}%mod