diff --git a/PROC18C.cpp b/PROC18C.cpp
new file mode 100644
index 0000000..a003c26
--- /dev/null
+++ b/PROC18C.cpp
@@ -0,0 +1,49 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define mod 1000000007
+char s1[21],s2[21];
+long long dp[21][2][2][163],v[163];
+long long solve(int i,int x,int c,int sum){
+	if(sum<0)return 0;
+	if(i==20){
+		return (sum==0);
+	}
+	if(dp[i][x][c][sum]!=-1)return dp[i][x][c][sum];
+	int g=0;
+	int h=9;
+	if(x==0)g=s1[i]-'0';
+	if(c==0)h=s2[i]-'0';
+	long long mx=0;
+	for(int j=h;j>=g;j--)
+	 {
+	    mx+=solve(i+1,x|j>g,c|j<h,sum-j);
+	    if(mx>=mod)mx-=mod;
+	 }
+	return dp[i][x][c][sum]=mx;
+}
+int main() {
+	ios_base::sync_with_stdio(false);
+	cin.tie(NULL);
+	int t;
+	cin>>t;
+	while(t--){
+		long long a,b;
+		cin>>a>>b;
+		memset(dp,-1,sizeof dp);
+		sprintf(s1,"%020lld",a);
+		sprintf(s2,"%020lld",b);
+		for(int i=1;i<=162;i++){
+			v[i]=solve(0,0,0,i)%mod;
+		}
+		long long ans=0;
+		for(int i=1;i<=162;i++){
+			for(int j=i+1;j<=162;j++){
+				if(__gcd(i,j)==1){
+					ans=(ans%mod+v[i]*v[j]%mod)%mod;
+				}
+			}
+		}
+		cout<<ans<<endl;
+	}
+	return 0;
+}
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