Remove the symbols andreverse the string

#include<stdio.h>
#include<string.h>
int main()
{
    char source[500]="123dfsw53464dlorwl35+=";
    char delimis[]="1,2,3,4,5,6,7,8,9,0,+,=";
    char *lone;
    lone=strtok(source,delimis);
    printf("%s \n",lone);
    int i;
    for(i=0;lone[i]!='\0';++i);
    for(i=i-1;i>=0;i--)
    printf("%c",lone[i]);
    return 0;
}