i;a[14];x(char*a){int b[6]={},f=1,i=56,j=0;char c[48];for(;--i;b[i/8]+=a[i]==111);for(;++i<6;j|=1<<b[i])f+=~j>>b[i]&b[i]>*b;for(;++i<56&&a[i]!=45;);return i-56?memcpy(c,a,48),c[i]='o',c[j=i%8*8+i/8]='x',f=x(c),c[i]+=9,c[j]-=9,j=x(c),f<j?f:j:f;}main(){for(;gets(a+i++*2););i=!printf("%d",x(a+2));}