#include<bits/stdc++.h>

#define maxn 55

using namespace std;

char board[maxn][maxn];

void init(){

    for(int i = ;i <= ;++i){

        for(int j = ;j <= ;++j){

            board[i][j] = 'A';

        }

    }

    for(int i = ;i <= ;++i){

        for(int j = ;j <= ;++j){

            board[i][j] = 'B';

        }

    }

    for(int i = ;i <= ;++i){

        for(int j = ;j <= ;++j){

            board[i][j] = 'C';

        }

    }

    for(int i = ;i <= ;++i){

        for(int j = ;j <= ;++j){

            board[i][j] = 'D';

        }

    }

}

int main(){

    init();

    int a,b,c,d;

    scanf("%d%d%d%d",&a,&b,&c,&d);

    --a,--b,--c,--d;

    for(int i = ;i <= ;i += ){

        if(a == ) break;

        for(int j = ;j <= ;j += ){

            if(a == ) break;

            board[i][j] = 'A';

            --a;

        }

    }

    for(int i = ;i <= ;i += ){

        if(b == ) break;

        for(int j = ;j <= ;j += ){

            if(b == ) break;

            board[i][j] = 'B';

            --b;

        }

    }

    for(int i = ;i <= ;i += ){

        if(c == ) break;

        for(int j = ;j <= ;j += ){

            if(c == ) break;

            board[i][j] = 'C';

            --c;

        }

    }

    for(int i = ;i <= ;i += ){

        if(d == ) break;

        for(int j = ;j <= ;j += ){

            if(d == ) break;

            board[i][j] = 'D';

            --d;

        }

    }

    printf("50 50\n");

    for(int i = ;i <= ;++i){

        for(int j = ;j <= ;++j){

            printf("%c",board[i][j]);

        }

        printf("\n");

    }

    return ;

}