str d (where:str) {
    print( "in D ", where, "\n")
    where = "d"
    print( "in D ", where, "\n")
}

str c ( ) {
    print( "in C ", where_g, "\n")
    where_g = "c"
    print( "in C ", where_g, "\n")
}

str b ( where:str ) {
    print( "in B ", where, "\n")
    where = "b" 
    print( "in B ", where, "\n")
}

str a( where:str ) {
    print( "in A ", where, "\n")
    where = "a" 
    b( where )
    print( "in A ", where, "\n")
}

where: str =  "global"
print( "in global ", where, "\n")
a( where )
print( "in global ", where, "\n")
global where_g:str
c( )
print( "in global ", where_g, "\n")