M=10**9+7
a,b,c,d,n=$<.read.split.map &:to_i
n1,n2,n3,n4=1,0,0,1
(n%8).times{n1,n2,n3,n4=n1-n3,n2-n4,n1+n3,n2+n4}
n1+=n3
n2+=n4
puts ((n1>0?b:a)*n1+(n2>0?d:c)*n2)*16.pow(n/8,M)%M