#include <stdio.h>
#include <string.h>
int main(){
	char x[1000];
	while(scanf("%s",&x)!=EOF){
int sum=0,y=0,ans=0,i,z[1000];
while(scanf("%s",&x)!=EOF){
for(i=0;i<strlen(x);i++){
	z[i]=x[i]-'0';
}
for(i=0;i<strlen(x);i++){
if(z[i]>=0 && z[i]<=9){
if(y==0){sum*=10;}sum+=z[i];y=0;
}else{y=1; ans+=sum; sum=0;}
}
if(sum!=0){
	ans+=sum;}
}
printf("%d\n",ans);
return 0;
}