q[];c;main(e,a,i,l){for(;c++||gets(a,c=15);){for(i=l=0;e=l[a?:""],q[l]=e&15,e;++l);for(;i<l||(q[l]=='–'?c=!printf("%d\n",c):!(q[l]=q[l]%'mº'*53,i=e=!e));q[i++]/=c)e|=q[i],q[i+1]+=q[i]%c*10;}}