N,P,Q,L=map(int,input().split())
S=list(map(int,input().split()))
mod=10**9+7
def cmb(n,r):
  if r<0 or r>n:
    return 0
  return (g1[n]*g2[r]*g2[n-r])%mod

g1=[1,1]
g2=[1,1]
inv=[0,1]
for i in range(2,50003):
  g1.append((g1[-1]*i)%mod)
  inv.append((-inv[mod%i]*(mod//i))%mod)
  g2.append((g2[-1]*inv[-1])%mod)
DP=[[[0]*(Q+2) for j in range(i+2)] for i in range(N+1)]
DP[0][0][0]=1
C=[[[0]*(Q+2) for j in range(i+2)] for i in range(N+1)]
for i in range(N+1):
  for j in range(i+1):
    for k in range(Q+1):
      C[i][j][k]%=mod
      DP[i][j][k]+=C[i][j][k]
      DP[i][j][k]%=mod
      C[i][j][k+1]+=C[i][j][k]
  if i==N:
    break
  for j in range(i+1):
    for k in range(Q+1):
      DP[i+1][j+1][k]+=DP[i][j][k]
      C[i+1][j][k+1]+=DP[i][j][k]
      C[i+1][j][min(Q+1,k+S[i]+1)]-=DP[i][j][k]
ANS=0
for i in range(N+1):
  for j in range(Q+1):
    x=L*(N-i)-j
    if x<=P:
      ANS+=cmb(N+P-x-1,P-x)*DP[N][i][j]
print(ANS%mod)