a,b,c,d,e,n=map(int,input().split())
M=10**9+7

if n<=1:
  print([a%M,(a+b)%M][n])
  exit()

def seki(a,b):
  l=4
  c=[[0]*l for i in range(l)]
  for i in range(l):
    for j in range(l):
      for k in range(l):
        c[i][j]+=a[i][k]*b[k][j]
        c[i][j]%=M
  return c

A=[
  [c,d,e,0],
  [1,0,0,0],
  [0,0,1,0],
  [c,d,e,1]
  ]

B=[
  [1,0,0,0],
  [0,1,0,0],
  [0,0,1,0],
  [0,0,0,1]
  ]

n-=1
for i in range(60):
  if (n>>i)&1:
    B=seki(A,B)
  A=seki(A,A)

print((B[3][0]*b+B[3][1]*a+B[3][2]*1+B[3][3]*(a+b))%M)