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

#define rd_init() char*rp=({char*mmap();mmap(0l,1l<<25,1,2,0,0ll);})
#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 chmax(v,a) (v=v>=a?v:a)

int main(){
	rd_init();
	int b=0;
	while(*rp){
		int a=0;
		while(*rp++=='y'&&*rp=='u'&&*++rp=='k'&&*++rp=='i'&&*++rp=='c'&&*++rp=='o'&&*++rp=='d'&&*++rp=='e'&&*++rp=='r'){
			++rp;
			a+=1;
		}
		chmax(b,a);
	}
	wt1(b);
	_exit(0);
}