n=int(input())
q=[0]*7
q[0]=1
M=10**9+7
for _ in range(n):
  nq=q.copy()
  d,l=map(int,input().split())
  for i in range(7):
    j=(i*pow(10,l,7)+d*(pow(10,l,7)-1)*pow(9,7-2,7))%7
    nq[j]+=q[i]
    nq[j]%=M
  q=nq
print(sum(i*q[i] for i in range(7))%M)