#include<bits/stdc++.h> using namespace std; int main() { string str; getline(cin,str); int minn=-1,tmp,last=0; bool flag=false; for(int i=0;i<str.size();i++){ if(str[i]=='A'||str[i]=='E'||str[i]=='I'||str[i]=='O'||str[i]=='U'){ flag=true; tmp=i-last; if(tmp>minn) minn=tmp; last=i; } } if(flag) cout<<minn<<endl; else cout<<str.size()+1<<endl; return 0; }