/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
	}
}

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#include <stdio.h>

int main() {
    char code[] = "int main { int a,b,c; a=10; b=5; c=a+b; return 0; }";
    int i = 0;

    while (code[i] != '\0') {
        // Check for lowercase variable names (a,b,c)
        if (code[i] >= 'a' && code[i] <= 'z') {
            // Only pick single-letter variables a,b,c
            if (code[i] == 'a' || code[i] == 'b' || code[i] == 'c') {
                printf("%c\n", code[i]);
            }
        }
        // Check for numbers
        else if (code[i] >= '0' && code[i] <= '9') {
            while (code[i] >= '0' && code[i] <= '9') {
                printf("%c", code[i]);
                i++;
            }
            printf("\n");
            continue;
        }
        i++;
    }

    return 0;
}