i,j;
char a[7][7];

q(int*a,int*b){return*b-*a;}

x(char a[][7],int t){
int b[7]={},f=1,i=0,j;
char c[7][7];
if(t){
for(;f&&++i;memcpy(c,a,49))for(j=0;f&&++j<7;f-=a[i][j]=='-');
c[i][j]='o';c[j+1][i-1]='x';f=x(c,t-1);
c[i][j]='x';c[j+1][i-1]='o';j=x(c,t-1);
return f<j?f:j;
}
for(;i++<7;)for(j=0;j<7;b[i]+=a[i][j++]=='o');
qsort(b+2,5,4,q);
for(i=1;i++<6;f+=b[i]>b[1]&&b[i-1]!=b[i]);
return f;
}

main(t){
for(;i<7;j=0,i++)for(gets(a[i]);j<7;t+=a[i][j++]=='-');
i=!printf("%d",x(a,t/2));
}