void _main(){char data;data=' ';fscanf (stdin, "%c", &data);{char result=data * 2;printHexCharLine(result);}}
static void main(){char data;data=' ';fscanf (stdin, "%c", &data);{char result=-1;if (data <=(CHAR_MAX/2)){result=data * 2;printHexCharLine(result);}else{printLine("Input value is too large to perform arithmetic safely.");}}}