{k=1;m=0;for(v=9;v>0;v--)c[substr("���������",v,1)]=v;d["��"]=1000;d["��"]=100;d["��"]=10;for(i=length()-1;i>0;i-=3){t=substr($1,i,2);if(d[t])z(d[t]);else{v+=k*c[substr(t,2,1)];m=0}}z();print v}function z(x){if(m)v+=k;k=x;m=1}