Question

Eins,zwei,drei,vier-Alle,alle(....)wir

Answer 1

Eins, zwei, drei, vier- Alle, alle fünf, sechs, sieben, acht, neun, zehn wir.

Answer 2

sagen "Hallo"!

The phrase you mentioned is the beginning of a popular German children's counting rhyme. It goes like this:

"Eins, zwei, drei, vier, Alle, alle, wir sagen 'Hallo'!"

In English, it translates to:

"One, two, three, four, All, all, we say 'Hello'!"

It's a fun way for children to learn to count and greet each other.