#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define getrp() ({char*mmap();mmap(0l,1l<<25,1,2,0,0ll);})
#define rd_skip() while(*rp++>=48)
#define rd() ({long _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})
#define wt(v) ({unsigned _z=v;do*--wp=_z%10+48;while(_z/=10);})
#define wt1(v) ({char wbuf[64],*wp=wbuf+sizeof wbuf;wt(v);write(1,wp,wbuf+sizeof wbuf-wp);})
#define rep(v,e) for(long v=0;v<e;++v)
#define rrep(v,e) for(long v=e;v--;)

int d[390625];
int es[200000];

int main(){
	char*rp=getrp();
	long n=rd();
	rd_skip();
	rep(i,n){
		int e=0;
		for(int c;c=*rp++-'0',c>=0;){
			e=e*5+c;
		}
		d[es[i]=e]=1;
	}
	{
		int m=1;
		rrep(o,8){
			rrep(i,78125/m){
				rrep(j,m*4){
					d[i*m*5+j]+=d[i*m*5+j+m];
				}
			}
			m*=5;
		}
	}
	{
		int z=0;
		rep(i,n){
			z+=d[es[i]]>1;
		}
		wt1(z);
	}
	_exit(0);
}