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#include<iostream>

void draw_fl(long long n){
	if( n%9 > 1 )
		std::cout << n%9 << "F";
	else if( n%9 == 1 )
		std::cout << "F";
	if(n >= 9){
		std::cout << "9[";
		draw_fl(n/9);
		std::cout << "]";
	}
}

void draw_al(long long n){
	if( n%9 > 1 )
		std::cout << n%9 << "A";
	else if( n%9 == 1 )
		std::cout << "A";
	if(n >= 9){
		std::cout << "9[";
		draw_al(n/9);
		std::cout << "]";
	}
}

void draw_el(long long n){
	if( n%9 > 1 )
		std::cout << n%9 << "E";
	else if( n%9 == 1 )
		std::cout << "E";
	if(n >= 9){
		std::cout << "9[";
		draw_el(n/9);
		std::cout << "]";
	}
}

void draw_dl(long long n){
	if( n%9 > 1 )
		std::cout << n%9 << "D";
	else if( n%9 == 1 )
		std::cout << "D";
	if(n >= 9){
		std::cout << "9[";
		draw_dl(n/9);
		std::cout << "]";
	}
}

void draw_bdl(long long n){
	if( n%9 > 1 )
		std::cout << n%9 << "[BD]";
	else if( n%9 == 1 )
		std::cout << "BD";
	if(n >= 9){
		std::cout << "9[";
		draw_bdl(n/9);
		std::cout << "]";
	}
}

void draw_cel(long long n){
	if( n%9 > 1 )
		std::cout << n%9 << "[CE]";
	else if( n%9 == 1 )
		std::cout << "CE";
	if(n >= 9){
		std::cout << "9[";
		draw_cel(n/9);
		std::cout << "]";
	}
}

void draw_trp_l(long long n){
	draw_fl(n);
	draw_bdl(n-1);
	std::cout << "B";
}

void draw_trp(long long n, long long m){
	if( n%9 > 1 ){
		std::cout << n%9 << "[";
		draw_trp_l(m);
		std::cout << "]";
	}else if( n%9 == 1 ){
		draw_trp_l(m);
	}
	if(n >= 9){
		std::cout << "9[";
		draw_trp(n/9, m);
		std::cout << "]";
	}
}

void draw_tr(long long n){
	if(n == 0) return;
	long long s = (n-1)/2;
	if(s>0){
		std::cout << "2[";
		draw_tr(s);
		std::cout << "]";
		draw_cel(2*s);
		draw_trp(s,s);
		draw_dl(s);
	}
	std::cout << "C";
	draw_al(2*s+1);
	if( n%2 == 0 ){
		draw_cel(2*s+1);
		std::cout << "C";
		draw_al(2*s+2);
	}
}

int main(){
	std::ios_base::sync_with_stdio(0);
	std::cin.tie(0);
	long long n;
	std::cin >> n;
	draw_tr(n);
	draw_el(n);
	return 0;
}