#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);}

int d[6000000/32];

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;
	int i=0;
	d[0]=1;
	for(int ch;ch=*rp++;){
		if(ch>=64){
			++i;
		}else{
			d[i>>5]|=1<<i;
			res+=i+a>=0&&d[i+c>>5]>>i+c&d[i+b>>5]>>i+b&d[i+a>>5]>>i+a&1;
		}
	}

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