inputfile4.txt

{   
    data = [ [ 100, 42 ], [ 100, 50 ], [ 123, 456 ], [ 300, 9000 ] ];   
    result = [ 0, 0, 0, 0 ];   
    i = 0;   
    while (i < 4){     
        a = data[i][0];     
        b = data[i][1];     
        if (a > 0){       
            while (b > 0){         
                if (a > b){           
                    a = a - b;         
                    } else {           
                        b = b - a;        
                     }        
                }     
            }     
        result[i] = a;     
        i = i + 1;  
     }   
print(result); 
}