/* File:        Assembly                                                     */
/* Author:      Daniel Kesselman (email: danielkesselman98@hotmail.com   	 */
/* Date:        25-9-2017	                                                 */
/* Version:     1.0                                                          */
/* Description: Performs 8 different assembly instructions with 2 registers.
 * Includes addition, subtraction, multiplication and in/decrementation.     */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main (int argc, char *argv[]) {
	int counter, R1, R2;
	char input, n;
	while (input != 'E') {
		scanf ("%c", &input);
/* LCS command */
		if (input == 'L') {
			for (counter = 0; counter < 5; counter++) {
				scanf ("%c", &input);
			}
			if (input == '1') {
				for (counter = 0; counter < 2; counter++) {
				scanf ("%c", &n);
				}
				R1 = n;
			}
			else {
				for (counter = 0; counter < 2; counter++) {
				scanf ("%c", &n);
				}
				R2 = n;
			}
		}
/* INC command */
		else if (input == 'I') {
			for (counter = 0; counter < 5; counter++) {
				scanf ("%c", &input);
			}
			if (input == '1') {
				R1 ++;
			}
			else {
				R2 ++;
			}
		}
/* DEC command */
		else if (input == 'D') {
			for (counter = 0; counter < 5; counter++) {
				scanf ("%c", &input);
			}
			if (input == '1') {
				R1 --;
			}
			else {
				R2 --;
			}
		}
/* ADD command */
		else if (input == 'A') {
			for (counter = 0; counter < 5; counter++) {
				scanf ("%c", &input);
			}
			if (input == '1') {
				for (counter = 0; counter < 3; counter++) {
					scanf ("%c", &input);
				}
				if (input == '1') {
					R1 = R1 + R1;
				}
				else {
					R1 = R1 + R2;
				}
			}
			else {
				for (counter = 0; counter < 3; counter++) {
					scanf ("%c", &input);
				}
				if (input == '1') {
					R2 = R2 + R1;
				}
				else {
					R2 = R2 + R2;
				}
			}
		}
/* SUB command */
		else if (input == 'S') {
			for (counter = 0; counter < 5; counter++) {
				scanf ("%c", &input);
			}
			if (input == '1') {
				for (counter = 0; counter < 3; counter++) {
					scanf ("%c", &input);
				}
				if (input == '1') {
					R1 = R1 - R1;
				}
				else {
					R1 = R1 - R2;
				}
			}
			else {
				for (counter = 0; counter < 3; counter++) {
					scanf ("%c", &input);
				}
				if (input == '1') {
					R2 = R2 - R1;
				}
				else {
					R2 = R2 - R2;
				}
			}
		}
/* MUL command */
		else if (input == 'M') {
			for (counter = 0; counter < 5; counter++) {
				scanf ("%c", &input);
			}
			if (input == '1') {
				for (counter = 0; counter < 3; counter++) {
					scanf ("%c", &input);
				}
				if (input == '1') {
					R1 = R1 * R1;
				}
				else {
					R1 = R1 * R2;
				}
			}
			else {
				for (counter = 0; counter < 3; counter++) {
					scanf ("%c", &input);
				}
				if (input == '1') {
					R2 = R2 * R1;
				}
				else {
					R2 = R2 * R2;
				}
			}
		}
/* OUT command */
		else if (input == 'O') {
			for (counter = 0; counter < 5; counter++) {
				scanf ("%c", &input);
			}
			if (input == '1') {
				printf ("%d\n", R1);
			}
			else {
				printf ("%d\n", R2);
			}
		}
	}
	return 0;
}