codeforces 118A - String Task

#include<stdio.h>
#include<string.h>
int main()
{
    char a[120];
    int i,len;
    gets(a);
    len = strlen(a);
    for(i=0;i<len;i++)
    {
        if(a[i]=='A'||a[i]=='a'||a[i]=='E'||a[i]=='e'||a[i]=='I'||a[i]=='i'||a[i]=='O'||a[i]=='o'||a[i]=='U'||a[i]=='u'||a[i]=='Y'||a[i]=='y')
            continue;
        printf(".%c",(a[i]>'a'&&a[i]<='z')?a[i]:a[i]+32);
    }
    return 0;
}