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

char*mmap();
#define rd_skip() while(*rp++>=48)
#define rd(v) int v=0;{int _c;while(_c=*rp++-48,_c>=0)v=v*10+_c;}

#define wt(v) {long _z=v;do*--wp=_z%10+48;while(_z/=10);}

char d[6000000];

main(){
	char*rp=mmap(0l,1l<<25,1,2,0,0ll);
	rd_skip();
	rd(a);
	rd(b);
	rd(c);
	c=-c;
	b=c-b;
	a=b-a;

	int res=0;
	char *p=d;
	*p=1;
	for(int ch;ch=*rp++;){
		if(ch&64){
			++p;
		}else{
			*p=1;
			res+=p+a>=d&&p[c]&p[b]&p[a];
		}
	}

	char wbuf[64],*wp=wbuf+sizeof wbuf;
	wt(res);
	write(1,wp,wbuf+sizeof wbuf-wp);
	_exit(0);
}